A Science teacher by trade, I've also been known to be found teaching Maths and PE! However, strange as it may seem, my real love is designing resources that can be used by other teachers to maximise the experience of the students. I am constantly thinking of new ways to engage a student with a topic and try to implement that in the design of the lessons.
A Science teacher by trade, I've also been known to be found teaching Maths and PE! However, strange as it may seem, my real love is designing resources that can be used by other teachers to maximise the experience of the students. I am constantly thinking of new ways to engage a student with a topic and try to implement that in the design of the lessons.
This bundle contains 7 fully-resourced and detailed lessons that have been designed to cover the content of topic 14.1 of the CIE International A-level Biology specification which concerns homeostasis in mammals. The wide range of activities included in each lesson will engage the students whilst the detailed content is covered and the understanding and previous knowledge checks allow them to assess their progress on the current topic as well as challenging them to make links to other related topics. Most of the tasks are differentiated to allow differing abilities to access the work and be challenged.
The following sub-topics are covered in this bundle of lessons:
The importance of homeostasis
The role of negative feedback mechanisms in the homeostatic control systems
The role of the nervous and endocrine systems in homeostasis
Deamination of amino acids and the urea cycle
The gross structure of the kidney and the detailed structure of the nephron
The process of ultrafiltration and selective reabsorption in the formation of urine
The roles of the hypothalamus, posterior pituitary gland, ADH and the collecting ducts in osmoregulation
The regulation of blood glucose concentration by the release of insulin and glucagon
The role of cyclic AMP as a secondary messenger
The stages of cell signalling
If you want to see the quality of the lessons before purchasing then the lesson on osmoregulation is a free resource to download
This engaging and fully-resourced lesson looks at examples of stabilising, directional and disruptive selection as the three main types of selection. The PowerPoint and accompanying resources have been designed to cover the 1st part of point 6.1.2 (e) of the OCR A-level Biology specification which states that students should be able to demonstrate and apply an understanding of the factors that affect the evolution of a species.
The lesson begins by making a link to a topic from module 4 as the students are challenged to use the mark, release, recapture method to calculate numbers of rabbits with different coloured fur in a particular habitat. Sketch graphs are then constructed to show the changes in the population size in this example. A quick quiz competition is used to engage the students whilst introducing the names of the three main types of selection before a class discussion point encourages the students to recognise which specific type of selection is represented by the rabbits. Key terminology including intermediate and extreme phenotypes and selection pressure are used to emphasise their importance during explanations. A change in the environment of the habitat and a change in the numbers of the rabbits introduces directional selection before students will be given time to discuss and to predict the shape of the sketch graph for disruptive selection. Students are challenged to apply their knowledge in the final task of the lesson by choosing the correct type of selection when presented with details of a population and answer related questions.
This lesson has been designed to tie in with another uploaded lesson on genetic drift which covers the second part of this specification point.
This fully-resourced lesson describes the process of skeletal muscle contraction in terms of the sliding filament theory. The engaging and detailed PowerPoint and accompanying resources have been designed to cover point 7.2 of the Pearson Edexcel A-level Biology A (Salters Nuffield) specification and includes the role of actin, myosin, troponin, tropomyosin, calcium ions and ATP.
The lesson begins with a study of the structure of the thick and thin filaments. Students will recognise that the protruding heads of the myosin molecule are mobile and this enables this protein to bind to the binding sites when they are exposed on actin. This leads into the introduction of troponin and tropomyosin and key details about the binding of calcium to this complex is explained. Moving forwards, students are encouraged to discuss possible reasons that can explain how the sarcomere narrows during contraction when the filaments remain the same length. This main part of the lesson goes through the main steps of the sliding filament model of muscle contraction and the critical roles of the calcium ions and ATP are discussed. The final task of the lesson challenges the students to apply their knowledge by describing the immediate effect on muscle contraction when one of the elements doesn’t function correctly.
This lesson has been written to tie in with another uploaded lesson on the structure of a muscle fibre which is covered in specification point 7.10
This fully-resourced lesson looks at the blood circulation in a mammal and considers how the pulmonary circulation differs from the systemic circulation. The engaging PowerPoint and accompanying resources have been designed to cover the third part of point 3.4.1 of the AQA A-level Biology specification
The lesson begins with a focus on the double circulatory system and checks that students are clear in the understanding that the blood passes through the heart twice per cycle of the body. Beginning with the pulmonary circulation, students will recall that the pulmonary artery carries the blood from the right ventricle to the lungs. An opportunity is taken at this point to check on their knowledge of inhalation and the respiratory system as well as the gas exchange between the alveoli and the capillary bed. A quick quiz is used to introduce arterioles and students will learn that these blood vessels play a crucial role in the changes in blood pressure that prevent the capillaries from damage. When looking at the systemic circulation, time is taken to look at the coronary arteries and renal artery as students have to be aware of these vessels in addition to the ones associated with the heart. In the final part of the lesson, students are challenged to explain how the structure of the heart generates a higher pressure in the systemic circulation and then to explain why the differing pressures are necessary.
This lesson has been written to tie in with the other uploaded lessons from topic 3.4.1 (mass transport in animals)
This fully-resourced lesson explains how individuals develop immunity and includes a focus on the different types (active, passive, natural, artificial). The engaging PowerPoint and accompanying resources have been designed to cover point 6.12 of the Pearson Edexcel A-level Biology A specification and there is also a description and discussion of herd immunity to increase the relevance to the current epidemic with COVID-19.
The lesson begins with a series of exam-style questions which challenge the students to demonstrate and apply their understanding of the immune response as covered in the previous lessons on topics 6.8 & 6.9. In answering and assessing their answers to these questions, the students will recognise the differences between the primary and secondary immune responses and are then encouraged to discuss how the production of a larger concentration of antibodies in a quicker time is achieved. The importance of antibodies and the production of memory cells for the development of immunity is emphasised and this will be continually referenced as the lesson progresses. The students will learn that this response of the body to a pathogen that has entered the body through natural processes is natural active immunity. Moving forwards, time is taken to look at vaccinations as an example of artificial active immunity. Another series of questions focusing on the MMR vaccine will challenge the students to explain how the deliberate exposure to antigenic material activates the immune response and leads to the retention of memory cells. A quick quiz competition is used to introduce the variety of forms that the antigenic material can take along with examples of diseases that are vaccinated against using these methods. The eradication of smallpox is used to describe the concept of herd immunity and the students are given time to consider the scientific questions and concerns that arise when the use of this pathway is a possible option for a government. The remainder of the lesson looks at the different forms of passive immunity and describes the drawbacks in terms of the need for a full response if a pathogen is reencoutered.
This bundle of detailed lesson PowerPoints and accompanying resources have been designed to cover the content of topic 5.1 (Photosynthesis) in the AQA A-level Biology specification. This cellular reaction can prove difficult for the students to understand, so extra planning has gone into these 4 lessons to ensure that the key details of the reactions are embedded and understanding is constantly checked through a variety of activities. All of the exam-style questions which are used in these current understanding and prior knowledge checks have mark schemes that are included in the PowerPoint to allow the students to assess their work.
If you would like to sample the quality of these lessons, download the chloroplast structure lesson as this has been uploaded for free.
The locus and linkage, meiosis, differential gene expression and protein transport within cells lessons have been uploaded for free and by downloading these, you will be able to observe the detail of planning that has gone into all of the lessons that are included in this bundle. This intricate planning ensures that the students are engaged and motivated whilst the detailed content of topic 3 (Cell structure, Reproduction and Development) of the Edexcel International A-level Biology specification is covered.
The 12 lesson PowerPoints and accompanying resources contain a wide range of activities which cover the following topic 3 specification points:
All living organisms are made of cells
Cells of multicellular organisms are organised into tissues, organs and organ systems
The ultrastructure of eukaryotic cells
The function of the organelles in eukaryotic animal cells
The role of the RER and Golgi apparatus in protein transport within cells
The ultrastructure of prokaryotic cells
Magnification and resolution in light and electron microscopes
The gene locus is the location of a gene on a chromosome
The linkage of genes on a chromosome
The role of meiosis in ensuring genetic variation
Understand how the mammalian gametes are specialised for their functions
The role of mitosis and the cell cycle in growth and asexual reproduction
The meaning of the terms stem cell, pluripotent, totipotent, morula and blastocyst
The decisions that have to be made about the use of stem cells in medical therapies
Cells become specialised through differential gene expression
One gene can give rise to more than one protein through post-transcriptional changes to mRNA
Phenotype is the interaction between genotype and the environment
Some phenotypes are affected by multiple alleles or by polygenic inheritance
Due to the detail included in all of these lessons, it is estimated that it will take in excess of 6 weeks of allocated A-level teaching time to complete the teaching of the bundle
This lesson describes the similarities and differences between the structure, position and function of the xylem, phloem and the sclerenchyma fibres. The engaging and detailed PowerPoint and accompanying resources have been designed to cover point 4.5 in unit 2 of the Edexcel International A-level Biology specification.
The lessons begins by challenging the students to identify the substances that a plant needs for the cellular reactions, where they are absorbed and where these reactions occur in a plant. The aim of this task is to get the students to recognise that water and mineral ions are absorbed in the roots and needed in the leaves whilst the products of photosynthesis are in the leaves and need to be used all over the plant. Students will be reminded that the xylem and phloem are part of the vascular system responsible for transporting these substances and then the rest of the lesson focuses on linking structure to function. A range of tasks which include discussion points, exam-style questions and quick quiz rounds are used to describe how lignification results in the xylem as a hollow tube of xylem cells to allow water to move as a complete column. They will also learn that the narrow diameter of this vessel allows capillary action to move water molecules up the sides of the vessel. The same process is used to enable students to understand how the structures of the companion cells allows assimilates to be loaded before being moved to the sieve tube elements through the plasmodesmata.
The final part of the lesson introduces the sclerenchyma tissue as part of the vascular bundle and along with the structure and function, the students will observe where this tissue is found in the stem in comparison to the xylem and phloem.
It is estimated that it will take in excess of 2 hours of A-level teaching time to cover the detail which has been written into this lesson
This fully-resourced lesson describes how rod cells in the mammalian retina detect stimuli to allow vision in low light intensity. The detailed PowerPoint and accompanying resources have been designed to cover the second part of point 8.5 of the Pearson Edexcel A-level Biology A (Salters Nuffield) specification and includes reference to the roles of rhodopsin, opsin, retinal, sodium ions, cation channels and hyperpolarisation in the formation of action potentials in the optic neurones.
It is likely that students will be aware that the human retina contains rod and cone cells, so this lesson builds on that knowledge and adds the detail needed at this level. Students will discover that the optical pigment in rod cells is rhodopsin and that the bleaching of this into retinal and opsin results in a cascade of events that allows an action potential to be initiated along the optic nerve. Time is taken to go through the events that occur in the dark and then the students are challenged to use this as a guide when explaining how the events differ in the light. Key terms like depolarisation and hyperpolarisation, that were met earlier in topic 8, are used to explain the changes in membrane potential and the resulting effect on the connection with the bipolar and ganglion cells is then described.
Hours of research and planning has gone into each and every one of the 9 lessons that are included in this lesson bundle that covers topic 18 of the CIE A-level Biology course . Conscious that some students do not fully engage in the topics of biodiversity, classsification and conservation, the lessons have been designed to contain a wide range of tasks which will motivate the students whilst the content of the following specification points are covered:
18.1: Biodiversity
Define the terms species, ecosystem and niche
Explain that biodiversity can be considered at three different levels
Explain the importance of random sampling in determining the biodiversity of an area
Use suitable methods to assess the distribution and abundance of organisms in a local area
Use Spearman’s rank correlation to analyse the relationship between the distribution and abundance of species and abiotic or biotic factors
Use Simpson’s Index of diversity
18.2: Classification
Describe the classification of species into the 8 taxonomic divisions
Outline the characteristic features of the three domains
Outline the characteristic features of the kingdoms
Explain why viruses are not included in the three domain classification and outline how they are classified
18.3: Conservation
The reasons for the need to maintain biodiversity
Discuss methods of protecting endangered species
The role of non-governmental organisations like the WWF and CITES in local and global conservation
If you would like to sample the quality of the lessons in this bundle, then download the Spearman’s rank correlation, features of the kingdoms and WWF, CITES and conservation lesson as these have been uploaded for free
This detailed lesson describes the absorption of water, the movement through the root and the role of the endodermis. Both the PowerPoint and accompanying resource have been designed to cover specification points (j, k & l) in topic 3 of AS unit 2 of the WJEC A-level Biology specification and includes descriptions of the apoplast, symplast and vacuolar pathways and the Casparian strip.
The lesson begins by looking at the specialised features of the root hair cell so that students can understand how these epidermal cells absorb water and mineral ions from the soil. Moving forwards, students are introduced to key terminology such as epidermis and root cortex before time is taken to look at the different pathways that water and minerals use to transverse across the cortex. Discussion points are included throughout the lesson to encourage the students to think about each topic in depth and challenges them to think about important questions such as why the apoplast pathway is needed for the water carrying the ions. The main part of the lesson focuses on the role of the endodermis in the transport of the water and ions into the xylem. Students will be introduced to the Casparian strip and will learn how this layer of cells blocks the apoplast pathway. A step by step method using class questions and considered answers is used to guide them through the different steps and to support them when writing the detailed description.
This lesson has been written to tie in with the next lesson on the pathways and mechanisms by which water and mineral ions are transported to the leaves.
This highly detailed, fully-resourced lesson has been designed to cover the content of specification point 5.1.4 (d) of the OCR A-level Biology A specification which states that students should be able to demonstrate and apply an understanding of the regulation of blood glucose concentration. There is focus on the negative feedback mechanisms that release insulin or glucagon and the role of the liver. It challenges the students recall of the control of insulin release from the beta cells which was taught in an earlier lesson.
A wide range of activities will maintain motivation and engagement whilst the content is covered in detail to enable the students to explain how the receptors in the pancreas detect the concentration change and how the hormones attaching to receptor sites on the liver triggers a series of events in this effector organ. This is a topic which has a huge amount of difficult terminology so time is taken to look at all of the key words, especially those which begin with the letter G so students are able to use them accurately in the correct context. The action of adrenaline is also considered and linked to the breakdown of glycogen to glucose during glycogenolysis.
This lesson has been written for students studying on the OCR A-level Biology A course and ties in with the lesson on the differences between type I and II diabetes mellitus as well as the human endocrine system
This clear and concise lesson explains how the inheritance of two or more genes that have loci on the same autosome demonstrates autosomal linkage. The engaging PowerPoint and associated resource have been designed to cover the part of point 7.1 of the AQA A-level Biology specification which states that students should be able to use fully-labelled genetic diagrams to interpret the results of crosses involving autosomal linkage.
This is a topic which can cause confusion for students so time was taken in the design to split the concept into small chunks. There is a clear focus on how the number of original phenotypes and recombinants can be used to determine linkage and suggest how the loci of the two genes compare. Important links to other topics such as crossing over in meiosis are made to enable students to understand how the random formation of the chiasma determines whether new phenotypes will be seen in the offspring or not. Linkage is an important cause of variation and the difference between observed and expected results and this is emphasised on a number of occasions. The main task of the lesson acts as an understanding check where students are challenged to analyse a set of results involving the inheritance of the ABO blood group gene and the nail-patella syndrome gene to determine whether they have loci on the same chromosome and if so, how close their loci would appear to be.
This lesson has been written to tie in with the other 6 lessons from topic 7.1 (Inheritance) and these have also been uploaded
This fully-resourced lesson describes how enzyme and substrate concentration affect the rate of enzyme activity. The PowerPoint and accompanying resources are the last in a series of 3 lessons which cover the detail of point 1.5 (iv) of the Edexcel A-level Biology B specification.
The first part of the lesson describes how an increase in substrate concentration will affect the rate of reaction when a fixed concentration of enzyme is used. Time is taken to introduce limiting factors and students will be challenged to identify substrate concentration as the limiting factor before the maximum rate is achieved and then they are given discussion time to identify the possible factors after this point. A series of exam-style questions are used throughout the lesson and the mark schemes are displayed to allow the students to assess their understanding and for any misconceptions to be immediately addressed. Moving forwards, the students have to use their knowledge of substrate concentration to construct a graph to represent the relationship between enzyme concentration and rate of reaction and they have to explain the different sections of the graph and identify the limiting factors.
The final section of the lesson describes how the availability of enzymes is controlled in living organisms. Students will come to recognise that this availability is the result of enzyme synthesis and enzyme degradation and their recall of transcription and translation is tested through a SPOT the ERRORs task.
Please note that this lesson explains the Biology behind the effect of concentration on enzyme-controlled reactions and not the methodology involved in carrying out such an investigation as this is covered in a core practical lesson.
All 4 of the lessons included in this bundle are highly-detailed to enable students to understand the sequence of events that occur during the body’s response to infection. Hours of planning have gone into the lesson PowerPoints and accompanying resources to ensure that the wide variety of tasks motivate and engage the students whilst challenging them to answer exam-style questions that cover the following specification points in topic 6.7 of the Edexcel A-level Biology B specification:
The mode of action of macrophages, neutrophils and lymphocytes
The development of the humoral immune response
The development of the cell-mediated response
The role of T and B memory cells in the secondary immune response
Immunity can be natural, artificial, active or passive
Vaccination can be used in the control of disease and the development of herd immunity
This can be a difficult topic for students to grasp, so time is taken to go over the key details to ensure that these are emphasised and retained
This bundle of 20 lessons covers the majority of the content that’s included in modules 5.1.1 - 5.1.4 of the OCR A-level Biology A specification. All of the lessons are highly detailed and have been planned at length to ensure that they are filled with a wide range of tasks to engage and motivate the students whilst checking on their understanding.
The following specification points are covered by the lessons in this bundle:
5.1.1: Communication and homeostasis
The communication between cells by cell signalling
The principle of homeostasis
The physiological and behavioural responses involved in temperature control in endotherms and ectotherms
5.1.2: Excretion as an example of homeostatic control
The functions of the mammalian liver
The gross structure and histology of the kidney
The processes of ultrafiltration and selective reabsorption
The control of the water potential of the blood
The effects of kidney failure and its potential treatments
5.1.3: Neuronal communication
The roles of mammalian sensory receptors in converting stimuli into nerve impulses
The structure and functions of sensory, relay and motor neurones
The generation and transmission of nerve impulses in mammals
The structures and roles of synapses in transmission
5.1.4: Hormonal communication
Endocrine communication by hormones
The structure and functions of the adrenal glands
The structure of the pancreas
The regulation of blood glucose concentration
The difference between diabetes mellitus type I and II
The potential treatments for diabetes mellitus
It is estimated that it will take in excess of 2 months of allocated A-level teaching time to cover the detail included in these lessons
If you would like to sample the quality of the lessons in this bundle, then download the following lessons as they have been shared for free:
The principles of homeostasis
Temperature control in ectotherms
The functions of the liver
The structure of the kidney
The generation and transmission of nerve impulses
Endocrine communication
This lesson bundle has been formed from the 13 detailed lesson PowerPoints and their accompanying resources that have been uploaded to cover a lot of the content in modules 2.1.4, 2.1.5 and 2.1.6 of the OCR A-level Biology A specification.
Each lesson contains a wide range of tasks, which include exam-style questions (with mark schemes), guided discussion points, and quick quiz competitions, that will engage and motivate the students whilst covering the following specification points:
Module 2.1.4: Enzymes
The role of enzymes in catalysing reactions that affect metabolism at a cellular and whole organism level
The role of enzymes in catalysing both intracellular and extracellular reactions
The mechanism of enzyme action
The effect of pH on enzyme activity
The effect of temperature on enzyme activity
The calculation of the temperature coefficient
The effect of enzyme and substrate concentration on enzyme activity
The need for coenzymes, cofactors and prosthetic groups in some enzyme-controlled reactions
Module 2.1.5: Biological membranes
The fluid mosaic model of membrane structure and the roles of its components
Simple and facilitated diffusion as forms of passive transport
Active transport, endocytosis and exocytosis as processes requiring ATP as an immediate source of energy
The movement of water across membranes by osmosis and the effects that solutions of different water potential can have on plant and animal cells
Module 2.1.6: Cell division, cell diversity and cellular organisation
The cell cycle
How the cell cycle is regulated
The main stages of mitosis
The significance of mitosis in life cycles
The significance of meiosis in life cycles
The main stages of meiosis
How cells of multicellular organisms are specialised for particular functions
The organisation of cells into tissues, organs and organ systems
The production of erythrocytes and neutrophils from stem cells in bone marrow
If you would like to sample the quality of the lessons in this bundle, then download the following lessons as they have been uploaded for free:
The roles of enzymes and mechanism of action
Simple and facilitated diffusion
Cell specialisation and organisation
This lesson describes how large molecules are hydrolysed to smaller molecules by the enzymes produced by the digestive system in mammals. The detailed PowerPoint and accompanying worksheets are part of the 1st lesson in a series of 2 which have been designed to cover the content of point 3.3 of the AQA A-level Biology specification and this lesson includes descriptions of the action of amylase, disaccharidases, lipase, endopeptidases, exopeptidases and dipeptidases.
The lesson has been designed to walk the students through the functions of the digestive system at each point of the digestive tract up until the duodenum and focuses on the action of the enzymes produced in the mouth, stomach and small intestine and by the accessory organs of the system. Time is taken to describe and explain key details, such as the fact that endopeptidases cleave peptide bonds within the molecules, meaning that they cannot break down proteins into monomers. The lesson is filled with exam-style questions which will develop their understanding of the current topic as well as checking on their knowledge of related topics which have been previously-covered such as the structure of the biological molecules and qualitative tests. In addition to the detailed content and regular questioning, the lesson PowerPoint contains guided discussion periods and two quick quiz competitions which introduce a key term and a key value in a fun and memorable way
This lesson has been specifically planned to prepare the students for the very next lesson where the mechanisms for the absorption of the products of digestion are described.
This bundle contains 7 lessons which are highly detailed and cover the following points in the surface area to volume ratio, gas exchange and digestion and absorption topics of the AQA A-level Biology specification:
The relationship between the size of an organism or structure and its surface area to volume ratio
The development of systems in larger organisms as adaptations that facilitate exchange as this ratio reduces
Adaptations of gas exchange surfaces in single-celled organisms, insects, bony fish and in the leaf of a dicotyledonous plant
The gross structure of the human gas exchange system
The essential features of the alveolar epithelium over which gas exchange takes place
Ventilation and the exchange of gases in the lungs
Digestion in mammals of carbohydrates, proteins and lipids
Mechanisms for the absorption of the products of digestion by cells lining the ileum
If you would like to sample the quality of lessons in this bundle, then download the alveolar epithelium and absorption in the ileum lessons as these have been uploaded for free
This lesson describes the action of bactericidal and bacteriostatic antibiotics, as illustrated by penicillin and tetracycline. The engaging PowerPoint and accompanying resources have been designed to cover point 6.3 (i) of the Edexcel A-level Biology B specification but it has been specifically planned to make continual links to earlier lessons in topic 6 and to protein synthesis as covered in topic 1
The lesson begins by challenging the students to use their general biological knowledge and any available sources to identify the suffixes cidal and static. Students will learn that when the prefix is added, these form the full names of two types of antibiotics. Their understanding of terminology is tested further as they have to recognise that Polymyxin B is an example of a bactericidal antibiotic as its actions would result in the death of the bacterial cell. Time is then taken to describe the action of penicillin and students will learn how inhibitors and modified versions of this antibiotic are used to overcome those bacteria who have resistance. Tetracycline is used as the example of a bacteriostatic antibiotic and students will discover that its prevention of the binding of tRNA that inhibits protein synthesis and this reduction and stopping of growth and reproduction is synonymous with these drugs. Students are challenged on their knowledge of translation and will also be given time for a class discussion to understand that these antibiotics encourage the body’s immune system to overcome the pathogen in natural, active immunity.
The final part of the lesson uses a quick quiz competition and a series of exam-style questions to ensure that students can recognise these different types of antibiotics from descriptions.
