Have your students explore scientists throughout history with this colourful, eye catching poster of Hippocrates, the famous ancient Greek known as the “Father of Medicine”. The file can be printed on paper up to A3 size, without any worries about losing quality of the image. Perfect for decorating the lab and reminding your students of the diverse group of people that gave us the knowledge to get where we are today. Copyright © 2020 The Efficient Science Teacher All rights reserved by author. Permission to copy for single classroom use only. Electronic distribution limited to single classroom use only.

Have your students explore scientists throughout history with this colourful, interesting poster of Florence Nightingale, famous nurse and the “Lady with the Lamp”. The file can be printed on paper up to A3 size, without any worries about losing quality of the image. Perfect for decorating the lab and reminding your students of the diverse group of people that gave us the knowledge to get where we are today. Copyright © 2020 The Efficient Science Teacher All rights reserved by author. Permission to copy for single classroom use only. Electronic distribution limited to single classroom use only.

Have your students explore scientists throughout history with this colourful, eye catching poster of Har Gobind Khorana, the famous, Nobel Prize winning biologist known for his work with nucleotides and genetics. The file can be printed on paper up to A3 size, without any worries about losing quality of the image. Perfect for decorating the lab and reminding your students of the diverse group of people that gave us the knowledge to get where we are today. Copyright © 2020 The Efficient Science Teacher All rights reserved by author. Permission to copy for single classroom use only. Electronic distribution limited to single classroom use only.

Have your students explore scientists throughout history with this colourful, interesting poster of Stephen Hawking. The file can be printed on paper up to A3 size, without any worries about losing quality of the image. Perfect for decorating the lab and reminding your students of the diverse group of people that gave us the knowledge to get where we are today. Copyright © 2020 The Efficient Science Teacher All rights reserved by author. Permission to copy for single classroom use only. Electronic distribution limited to single classroom use only.

Practical 28 in the History in STEM practical series. In this practical the students will start by reading about the history of firefighting throughout the ages, including a focus of how a WWII Aircraft Carrier was saved through the use of carbon dioxide during the Battle of Midway. After, the students will use various methods (acid-base reactions and decomposition with catalyst) to produce various gases which will then be flame tested to confirm the identity. This practical is a great way to combine history and chemistry together in one lesson and the experiments really allow the students to explore various aspects related to reactions. **More about the History in STEM practical Series ** This series is designed to bring quality cross-curricula material to STEM subjects, that help students to explore and discover phenomena normally taught, while getting a glimpse into the history of its development. In addition, a number of the practicals give the students the opportunity to play “Mythbusters”, looking at a number of different methods and having to reason why one or the other was the more likely or useful method. From Ancient Greece to Vikings, China to the Golden age of the Muslim empire and beyond to India, the series takes a look at some of the most important STEM achievements throughout history. There is a plan for about 35-40 of these such practicals in this series, so, if you liked this one, consider looking at some of the others, or check out some of the bundles available. Copyright © 2022 The Efficient Science Teacher All rights reserved by author. Permission to copy for single classroom use only. Electronic distribution limited to single classroom use only.

Have your students explore scientists throughout history with this easy to print poster of Sophie Germain, the famous mathematician known for calculating the Sophie’s prime numbers. The file can be printed on paper up to A3 size, without any worries about losing quality of the image. Perfect for decorating the lab and reminding your students of the diverse group of people that gave us the knowledge to get where we are today. Copyright © 2020 The Efficient Science Teacher All rights reserved by author. Permission to copy for single classroom use only. Electronic distribution limited to single classroom use only.

Part 2 in the History in STEM practical series. This time we are taking a look at the famous experiment regarding the link between an objects volume and water displacement, in order to calculate the density of a dodgy crown by that eccentric scientist Archimedes. Note: The “Crown” in the practical can be anything you want. However, it will link better to the story if it is a crown. More about the History in STEM practical Series This series is designed to bring quality cross-curricula material to STEM subjects, that help students to explore and discover phenomena normally taught, while getting a glimpse into the history of its development. In addition, a number of the practicals give the students the opportunity to play “Mythbusters”, looking at a number of different methods and having to reason why one or the other was the more likely or useful method. From Ancient Greece to Vikings, China to the Golden age of the Muslim empire and beyond to India, the series takes a look at some of the most important STEM achievements throughout history. There is a plan for 40 of these such practicals in this series, so, if you liked this one, consider looking at some of the others, or check out some of the bundles available.

Practical 4 in the History in STEM practical series. In this practical we are looking at the Viking Sunstone, the theoretical genius navigation method, making much of the Viking exploration possible. Working with Icelandic Spar (Calcite Crystal) which, through the process of birefrigence, causes light passing through it to be refracted at two separate angles. Using this, with some small effort, research has shown that the stone could be used to locate the sun, even on an overcast day, within a few degrees, allowing for the journey to continue. More about the History in STEM practical Series This series is designed to bring quality cross-curricula material to STEM subjects, that help students to explore and discover phenomena normally taught, while getting a glimpse into the history of its development. In addition, a number of the practicals give the students the opportunity to play “Mythbusters”, looking at a number of different methods and having to reason why one or the other was the more likely or useful method. From Ancient Greece to Vikings, China to the Golden age of the Muslim empire and beyond to India, the series takes a look at some of the most important STEM achievements throughout history. There is a plan for 40 of these such practicals in this series, so, if you liked this one, consider looking at some of the others, or check out some of the bundles available.

Practical 7 in the History in STEM practical series. In this practical, you will be looking at the illusive history of invisible ink and the chemical reactions behind them. Have a look at the different methods used, beginning in Ancient Greece and continuing through history all the way through to modern times. Test their effectiveness in application, invisibility and ease of development, and decide for yourself, which of the methods you would choose. Finally, take your knowledge and apply it to working out the teachers secret message. Which method did they use? Use observations and clues to make your deductions and then test your hypothesis. More about the History in STEM practical Series This series is designed to bring quality cross-curricula material to STEM subjects, that help students to explore and discover phenomena normally taught, while getting a glimpse into the history of its development. In addition, a number of the practicals give the students the opportunity to play “Mythbusters”, looking at a number of different methods and having to reason why one or the other was the more likely or useful method. From Ancient Greece to Vikings, China to the Golden age of the Muslim empire and beyond to India, the series takes a look at some of the most important STEM achievements throughout history. There is a plan for 40 of these such practicals in this series, so, if you liked this one, consider looking at some of the others, or check out some of the bundles available. Other practicals in the series: Similar Triangles - History of STEM practicals - How Far Is That Boat? Water Alarm Clock - History of STEM practicals - Pressure and Displacement Viking Sunstones - History of STEM practicals - Refraction and Birefringence Pythagoras’ Cup - History of STEM practicals - Siphon Archimedes’ Eureka - History of STEM practicals - Density Measuring the World - History of STEM Practicals - Circumference of Circles

Practical 6 in the History in STEM practical series. In this practical, you will be using similar triangles to measure how far off distant objects are. This technique is believed to have been used in Ancient Greece and other locations for a number of reasons and is a very simple to conduct, group work activity where each member has defined roles, ensuring that participation is high. It can be used and adapted to teach a number of aspects of similar triangles, but as it is set up, would be a great introduction to the topic. More about the History in STEM practical Series This series is designed to bring quality cross-curricula material to STEM subjects, that help students to explore and discover phenomena normally taught, while getting a glimpse into the history of its development. In addition, a number of the practicals give the students the opportunity to play “Mythbusters”, looking at a number of different methods and having to reason why one or the other was the more likely or useful method. From Ancient Greece to Vikings, China to the Golden age of the Muslim empire and beyond to India, the series takes a look at some of the most important STEM achievements throughout history. There is a plan for 40 of these such practicals in this series, so, if you liked this one, consider looking at some of the others, or check out some of the bundles available. Other practicals in the series: Similar Triangles - History of STEM practicals - How Far Is That Boat? Water Alarm Clock - History of STEM practicals - Pressure and Displacement Viking Sunstones - History of STEM practicals - Refraction and Birefringence Pythagoras’ Cup - History of STEM practicals - Siphon Archimedes’ Eureka - History of STEM practicals - Density Measuring the World - History of STEM Practicals - Circumference of Circles

Practical 11 in the History in STEM practical series. In practical 11 continue to look a little more into the paper industry, as well as its impact on the world in terms of deforestation. In the practical section there are instructions for a classic paper making experiment, with a twist. There are not just instructions for recycled paper, but for cotton paper, leaf paper and grass paper. The students then need to look at the strengths and weaknesses of these paper, and assess whether they could become suitable alternatives to wood pulp, thus reducing the impact on the forests by the wood and pulp industry. So, rather than just looking at the theoretical, this practical encourages students to actively seek answers to today’s burning questions. More about the History in STEM practical Series This series is designed to bring quality cross-curricula material to STEM subjects, that help students to explore and discover phenomena normally taught, while getting a glimpse into the history of its development. In addition, a number of the practicals give the students the opportunity to play “Mythbusters”, looking at a number of different methods and having to reason why one or the other was the more likely or useful method. From Ancient Greece to Vikings, China to the Golden age of the Muslim empire and beyond to India, the series takes a look at some of the most important STEM achievements throughout history. There is a plan for 40 of these such practicals in this series, so, if you liked this one, consider looking at some of the others, or check out some of the bundles available. Other practicals in the series: Grab the bundle for the biggest saving or get the individual practicals: Similar Triangles - History of STEM practicals - How Far Is That Boat? Water Alarm Clock - History of STEM practicals - Pressure and Displacement Viking Sunstones - History of STEM practicals - Refraction and Birefringence Pythagoras’ Cup - History of STEM practicals - Siphon Archimedes’ Eureka - History of STEM practicals - Density Measuring the World - History of STEM Practicals - Circumference of Circles Chemical Reactions - History of STEM practicals - Invisible Ink Practical Statistics and Cryptography - History of STEM practicals - Crack the Code Force and Tensile Strength - History of STEM practicals - Paper Part 1 Copyright © 2020 The Efficient Science Teacher All rights reserved by author. Permission to copy for single classroom use only. Electronic distribution limited to single classroom use only.

Practical 9 in the History in STEM practical series. This is part 1 of a two part mini-series on the history and development of paper. In this practical, paper is pitted against papyrus in a battle to see which of the two can support the most weight and has the higher tensile strength. There are two methods available, one with pre-purchased papyrus and another with full instructions on how to make papyrus from scratch to test the different properties. Once you have the papyrus paper, the practical can be run with little equipment and is easy to improvise and adapt to what you already have in the lab. More about the History in STEM practical Series This series is designed to bring quality cross-curricula material to STEM subjects, that help students to explore and discover phenomena normally taught, while getting a glimpse into the history of its development. In addition, a number of the practicals give the students the opportunity to play “Mythbusters”, looking at a number of different methods and having to reason why one or the other was the more likely or useful method. From Ancient Greece to Vikings, China to the Golden age of the Muslim empire and beyond to India, the series takes a look at some of the most important STEM achievements throughout history. There is a plan for 40 of these such practicals in this series, so, if you liked this one, consider looking at some of the others, or check out some of the bundles available. Other practicals in the series: Check out the bundle for the best savings or get the individual practicals: Similar Triangles - History of STEM practicals - How Far Is That Boat? Water Alarm Clock - History of STEM practicals - Pressure and Displacement Viking Sunstones - History of STEM practicals - Refraction and Birefringence Pythagoras’ Cup - History of STEM practicals - Siphon Archimedes’ Eureka - History of STEM practicals - Density Measuring the World - History of STEM Practicals - Circumference of Circles Chemical Reactions - History of STEM practicals - Invisible Ink Practical Statistics and Cryptography - History of STEM practicals - Crack the Code Force and Tensile Strength - History of STEM practicals - Paper Part 1

Note: This would be a great followup practical after completing your Pythagoras Cup. Practical 5 in the History in STEM practical series. In this practical we are looking at the humble beginnings of the alarm clock. This version is based on a design believed to be used by Plato, to make sure he got up on time. It teaches a number of concepts, such as siphons, as well as displacement and air pressure. It takes the principle of the cup and applies it in a new way. When the water siphons into the vessel, it displaces the air out, forcing it through a whistle, causing it to sound. You can tweak the practical to have the time it takes for the alarm to go off, to suit whatever purpose you like. This is probably more than a single lesson practical, but might be a good collaborative project. Bring the Arts department in to get some cool decorations for the clock. Get the history team to talk about Plato and the philosophers of ancient Greece and turn this practical into a real cross curriculum event. More about the History in STEM practical Series This series is designed to bring quality cross-curricula material to STEM subjects, that help students to explore and discover phenomena normally taught, while getting a glimpse into the history of its development. In addition, a number of the practicals give the students the opportunity to play “Mythbusters”, looking at a number of different methods and having to reason why one or the other was the more likely or useful method. From Ancient Greece to Vikings, China to the Golden age of the Muslim empire and beyond to India, the series takes a look at some of the most important STEM achievements throughout history. There is a plan for 40 of these such practicals in this series, so, if you liked this one, consider looking at some of the others, or check out some of the bundles available. Other practicals in the series: Similar Triangles - History of STEM practicals - How Far Is That Boat? Water Alarm Clock - History of STEM practicals - Pressure and Displacement Viking Sunstones - History of STEM practicals - Refraction and Birefringence Pythagoras’ Cup - History of STEM practicals - Siphon Archimedes’ Eureka - History of STEM practicals - Density Measuring the World - History of STEM Practicals - Circumference of Circles

Practical 10 in the History in STEM practical series. In practical 10 we exam the history of the humble barometer. From 1000s of years of misconceptions about the workings of air pressure and vacuums, it was only in the 1600s that enough of an understanding was there in order to build this useful weather predictor. In the practical section there are two methods for building a barometer for yourself. With this practical using easily obtainable household materials to build the instrument, this is a perfect experiment to be done via distance learning if needed. As an addition, there are instructions for a very BIG teacher demo that is sure to be remembered. More about the History in STEM practical Series This series is designed to bring quality cross-curricula material to STEM subjects, that help students to explore and discover phenomena normally taught, while getting a glimpse into the history of its development. In addition, a number of the practicals give the students the opportunity to play “Mythbusters”, looking at a number of different methods and having to reason why one or the other was the more likely or useful method. From Ancient Greece to Vikings, China to the Golden age of the Muslim empire and beyond to India, the series takes a look at some of the most important STEM achievements throughout history. There is a plan for 40 of these such practicals in this series, so, if you liked this one, consider looking at some of the others, or check out some of the bundles available. Other practicals in the series: Grab the a bundle for the biggest saving or get the individual practicals: Similar Triangles - History of STEM practicals - How Far Is That Boat? Water Alarm Clock - History of STEM practicals - Pressure and Displacement Viking Sunstones - History of STEM practicals - Refraction and Birefringence Pythagoras’ Cup - History of STEM practicals - Siphon Archimedes’ Eureka - History of STEM practicals - Density Measuring the World - History of STEM Practicals - Circumference of Circles Chemical Reactions - History of STEM practicals - Invisible Ink Practical Statistics and Cryptography - History of STEM practicals - Crack the Code Force and Tensile Strength - History of STEM practicals - Paper Part 1 Check the Weather - Barometer - Pressure and Climate - Distance Learning

Practical 8 in the History in STEM practical series. In this activity, you will be looking into the ancient world of encrypted messages. Starting with the simple Caesar Cipher, and moving through the ages, students will have the chance to crack the codes using statistical analysis of a given text, having them use patterns in grammar and frequency of words as a guide (an added cross-curriculum benefit), before perhaps making their own coded messages. This is the best way to incorporate percentages, bar charts, data analysis into a lesson, that will have the kids talking about it for years to come. More about the History in STEM practical Series This series is designed to bring quality cross-curricula material to STEM subjects, that help students to explore and discover phenomena normally taught, while getting a glimpse into the history of its development. In addition, a number of the practicals give the students the opportunity to play “Mythbusters”, looking at a number of different methods and having to reason why one or the other was the more likely or useful method. From Ancient Greece to Vikings, China to the Golden age of the Muslim empire and beyond to India, the series takes a look at some of the most important STEM achievements throughout history. There is a plan for 40 of these such practicals in this series, so, if you liked this one, consider looking at some of the others, or check out some of the bundles available. Other practicals in the series: Similar Triangles - History of STEM practicals - How Far Is That Boat? Water Alarm Clock - History of STEM practicals - Pressure and Displacement Viking Sunstones - History of STEM practicals - Refraction and Birefringence Pythagoras’ Cup - History of STEM practicals - Siphon Archimedes’ Eureka - History of STEM practicals - Density Measuring the World - History of STEM Practicals - Circumference of Circles Chemical Reactions - History of STEM practicals - Invisible Ink Practical Statistics and Cryptography - History of STEM practicals - Crack the Code

Have your students explore scientists throughout history with this colourful, interesting poster of Stephen Hawking. The file can be printed on paper up to A3 size, without any worries about losing quality of the image. Perfect for decorating the lab and reminding your students of the diverse group of people that gave us the knowledge to get where we are today. Want the set? Get the bundle and save! The 12 figures in the bundle include: Physics: Albert Einstein - Famous for his theories on relatively. Marie Curie - A pioneer in radioactive material research Nikola Tesla - A driving force in the field of electronics. Chemistry: Mendeleev - Responsible for the periodic table we recognise today. Cai Lun - Attributed with creating the first true paper in China. Jabir Ibn-Hayyan - The legendary figure, known as the “Father of Chemistry”, reportedly responsible for producing the “aqua regis”. Biology Charles Darwin - The famous author of “Origins of Species”. Alfred Wallace - Co-creator of the theory of Evolution. Jane Goodall - A famous scientist who, working with chimpanzees, gained a whole knew understanding of interaction between organisms. Mathematics Pythagoras - Famous for his theory on Triangles, as well as not liking beans. Mary Jackson - The first female African-American engineer for NASA, as seen in the recent movie, “Hidden Figures”. Brahmagupta - An Indian mathematician, credited with creating the rules governing the use of “0” as a number in calculations. If you like this resource, keep an eye out for bundle 2 coming out very soon with another 12 scientists. Like something a little more interactive? Get these 12 scientists as cut and build dioramas as a quick to prepare cover lesson or for when you have a difficult afternoon lesson. Can’t get enough of the History of STEM? Check out my bundle of science experiments replicating famous experiments throughout history. Copyright © 2020 The Efficient Science Teacher All rights reserved by author. Permission to copy for single classroom use only. Electronic distribution limited to single classroom use only.

Have your students explore scientists throughout history with this colourful, interesting poster of Brahmagupta. The file can be printed on paper up to A3 size, without any worries about losing quality of the image. Perfect for decorating the lab and reminding your students of the diverse group of people that gave us the knowledge to get where we are today. Want the set? Get the bundle and save! The 12 figures in the bundle include: Physics: Albert Einstein - Famous for his theories on relatively. Marie Curie - A pioneer in radioactive material research Nikola Tesla - A driving force in the field of electronics. Chemistry: Mendeleev - Responsible for the periodic table we recognise today. Cai Lun - Attributed with creating the first true paper in China. Jabir Ibn-Hayyan - The legendary figure, known as the “Father of Chemistry”, reportedly responsible for producing the “aqua regis”. Biology Charles Darwin - The famous author of “Origins of Species”. Alfred Wallace - Co-creator of the theory of Evolution. Jane Goodall - A famous scientist who, working with chimpanzees, gained a whole knew understanding of interaction between organisms. Mathematics Pythagoras - Famous for his theory on Triangles, as well as not liking beans. Mary Jackson - The first female African-American engineer for NASA, as seen in the recent movie, “Hidden Figures”. Brahmagupta - An Indian mathematician, credited with creating the rules governing the use of “0” as a number in calculations. If you like this resource, keep an eye out for bundle 2 coming out very soon with another 12 scientists. Like something a little more interactive? Get these 12 scientists as cut and build dioramas as a quick to prepare cover lesson or for when you have a difficult afternoon lesson. Can’t get enough of the History of STEM? Check out my bundle of science experiments replicating famous experiments throughout history. Copyright © 2020 The Efficient Science Teacher All rights reserved by author. Permission to copy for single classroom use only. Electronic distribution limited to single classroom use only.

Have your students explore scientists throughout history with this colourful, interesting poster of Mary Jackson. The file can be printed on paper up to A3 size, without any worries about losing quality of the image. Perfect for decorating the lab and reminding your students of the diverse group of people that gave us the knowledge to get where we are today. Want the set? Get the bundle and save! The 12 figures in the bundle include: Physics: Albert Einstein - Famous for his theories on relatively. Marie Curie - A pioneer in radioactive material research Nikola Tesla - A driving force in the field of electronics. Chemistry: Mendeleev - Responsible for the periodic table we recognise today. Cai Lun - Attributed with creating the first true paper in China. Jabir Ibn-Hayyan - The legendary figure, known as the “Father of Chemistry”, reportedly responsible for producing the “aqua regis”. Biology Charles Darwin - The famous author of “Origins of Species”. Alfred Wallace - Co-creator of the theory of Evolution. Jane Goodall - A famous scientist who, working with chimpanzees, gained a whole knew understanding of interaction between organisms. Mathematics Pythagoras - Famous for his theory on Triangles, as well as not liking beans. Mary Jackson - The first female African-American engineer for NASA, as seen in the recent movie, “Hidden Figures”. Brahmagupta - An Indian mathematician, credited with creating the rules governing the use of “0” as a number in calculations. If you like this resource, keep an eye out for bundle 2 coming out very soon with another 12 scientists. Like something a little more interactive? Get these 12 scientists as cut and build dioramas as a quick to prepare cover lesson or for when you have a difficult afternoon lesson. Can’t get enough of the History of STEM? Check out my bundle of science experiments replicating famous experiments throughout history. Copyright © 2020 The Efficient Science Teacher All rights reserved by author. Permission to copy for single classroom use only. Electronic distribution limited to single classroom use only.

Have your students explore scientists throughout history with this colourful, interesting poster of Eratosthenes. The file can be printed on paper up to A3 size, without any worries about losing quality of the image. Perfect for decorating the lab and reminding your students of the diverse group of people that gave us the knowledge to get where we are today. Want the set? Get the bundle and save! The 12 figures in the bundle include: Physics: Albert Einstein - Famous for his theories on relatively. Marie Curie - A pioneer in radioactive material research Nikola Tesla - A driving force in the field of electronics. Chemistry: Mendeleev - Responsible for the periodic table we recognise today. Cai Lun - Attributed with creating the first true paper in China. Jabir Ibn-Hayyan - The legendary figure, known as the “Father of Chemistry”, reportedly responsible for producing the “aqua regis”. Biology Charles Darwin - The famous author of “Origins of Species”. Alfred Wallace - Co-creator of the theory of Evolution. Jane Goodall - A famous scientist who, working with chimpanzees, gained a whole knew understanding of interaction between organisms. Mathematics Pythagoras - Famous for his theory on Triangles, as well as not liking beans. Mary Jackson - The first female African-American engineer for NASA, as seen in the recent movie, “Hidden Figures”. Brahmagupta - An Indian mathematician, credited with creating the rules governing the use of “0” as a number in calculations. If you like this resource, keep an eye out for bundle 2 coming out very soon with another 12 scientists. Like something a little more interactive? Get these 12 scientists as cut and build dioramas as a quick to prepare cover lesson or for when you have a difficult afternoon lesson. Can’t get enough of the History of STEM? Check out my bundle of science experiments replicating famous experiments throughout history. Copyright © 2020 The Efficient Science Teacher All rights reserved by author. Permission to copy for single classroom use only. Electronic distribution limited to single classroom use only.

Have your students explore scientists throughout history with this colourful, interesting poster of Pythagoras. The file can be printed on paper up to A3 size, without any worries about losing quality of the image. Perfect for decorating the lab and reminding your students of the diverse group of people that gave us the knowledge to get where we are today. Want the set? Get the bundle and save! The 12 figures in the bundle include: Physics: Albert Einstein - Famous for his theories on relatively. Marie Curie - A pioneer in radioactive material research Nikola Tesla - A driving force in the field of electronics. Chemistry: Mendeleev - Responsible for the periodic table we recognise today. Cai Lun - Attributed with creating the first true paper in China. Jabir Ibn-Hayyan - The legendary figure, known as the “Father of Chemistry”, reportedly responsible for producing the “aqua regis”. Biology Charles Darwin - The famous author of “Origins of Species”. Alfred Wallace - Co-creator of the theory of Evolution. Jane Goodall - A famous scientist who, working with chimpanzees, gained a whole knew understanding of interaction between organisms. Mathematics Pythagoras - Famous for his theory on Triangles, as well as not liking beans. Mary Jackson - The first female African-American engineer for NASA, as seen in the recent movie, “Hidden Figures”. Brahmagupta - An Indian mathematician, credited with creating the rules governing the use of “0” as a number in calculations. If you like this resource, keep an eye out for bundle 2 coming out very soon with another 12 scientists. Like something a little more interactive? Get these 12 scientists as cut and build dioramas as a quick to prepare cover lesson or for when you have a difficult afternoon lesson. Can’t get enough of the History of STEM? Check out my bundle of science experiments replicating famous experiments throughout history. Copyright © 2020 The Efficient Science Teacher All rights reserved by author. Permission to copy for single classroom use only. Electronic distribution limited to single classroom use only.