A complete, KS4 lesson For USA - this lesson is for use between 8th to 10th grade. There is nothing for you to do but give it a quick look through and familiarise yourself with it. Lesson objectives: * Understand the difference between mass and weight. * Understand the role that gravity plays in this difference. * Be able to successfully calculate weight and mass. This carefully crafted lesson is over 30 slides long, and is full of learning activities as below: * Starter - simple task where students self-assess against the objectives. * Quiz with answers. * Questions – all answers are provided. * Differentiated questions – all answers are provided. * Peer marking * Self marking * Theory slides (carefully sculpted, interspaced with learning activities, * Play ball. * Video clip link (carefully selected – this alone can save you 20+ minutes of searching). * Paired work activities – all answers are provided. * Scientific Literacy activity. * Scientific Numeracy activity * Plenary formative/summative assessment quiz / activity. * Student self-assessment versus objectives activity – so learners can judge for themselves how much they have learnt. * Extension activities – just in case additional activities are required. Please purchase this lesson, and leave a positive review. This lesson is part of a series, whilst they all work very well as standalone individual lessons you may wish to buy others from the series: 0. Bundles – contain 3 or more of these lessons at a discounted price (however please note not all my series are bundled). 1. Vectors and scalars. 2. Forces between objects (contact / non-contact and Newton’s 3rd law). 3. Forces and Newton’s third law (N3L). 4. Resultant forces, free body diagrams. 5. Forces and acceleration F=Ma 6. Required practical F=Ma 7 to 12 - please see list in this powerpoint Thank you, and happy teaching! Yours, Barclayfox.

UPDATED AND IMPROVED. Have lots of fun this Christmas with these fun, entertaining and engaging Christmas quizzes and activities. Based on xmas throughout and split into 4 interesting and fun rounds as noted below. Great fun ! Ready to use – nothing to do. Students lead (if you want them to) so you can focus on whatever or whoever needs your attention, or even, whisper this :-) , RELAX for a change !  Christmas Physics AND * Christmas Thinking AND * Christmas Observation AND * Bonus Round. Contains over 80 pages of fun: Christmas quiz questions. Up and about game – Christmas Physics. Christmas thinking skills. Christmas observation skills. Christmas cracker jokes. Huge numbers of high quality Christmas images. Videos (carefully selected). Music (carefully selected). Up and about games. You’re fired. Surprise bonus round ! Can be used for all abilities and age groups from 8 to 18 *** GREAT VALUE AT THIS PRICE! TREAT YOURSELF AND HAVE A BREAK! *** To see all my Christmas resources please type barclayfox Christmas into the tes search engine. Happy Christmas, and most sincere best wishes of the season to you all !!! :-) Happy teaching, Barclayfox. SEARCH WORDS - does this help people who are searching? Christmas Physics, thinking, observation, pop music, Holidays, Santa, fun, Christmas, Christmas quiz, literacy, numeracy, Christmas activities, Christmas assembly, Noel, Navidad, advent, music, nativity, Xmas science, Christmas maths, Christmas English, Christmas Geography, Navidad, Noel, advent, Santa Clause, Reindeer, sleigh, snow, snowman, xmas lights, mince pie, turkey, trimmings, decorations, Queen’s speech, boxing day, cold meat and pickles, Christmas crackers. 

High quality, complete and ready to use lesson. For use in KS3 and for lower and middle ability groups in KS4. ‘‘ECLIPSES’’ - STUDENT OUTCOMES: By the end of the lesson students will be able to: * Understand new key words such as eclipse, umbra, penumbra etc. * Understand what solar and lunar eclipses are. * Be able to explain what happens during a solar and lunar eclipse * Be able to draw diagrams of a solar and a lunar eclipse. STARTER Pupils will start the lessons by thinking and working in pairs and doing a mini quiz. After discussion of the answers this leads on to revealing the title and lesson outcomes, students then self assess their current understanding of what this lesson is going to cover. MAIN and MAIN and MAIN.... This lesson is chunked into discrete sections to support learning and engender positive behaviour by keeping students interested and focused. All points of the specification are addressed. There are various student activities such as: practical, gap fill, carefully selected videos, paired work, literacy activities, focused questions with answers and differentiation, SMSC, quiz, homework, self-assessment and peer assessment opportunities etc. This good variety of activities keeps pupils focused and happily learning. PLENARY: In the plenary activity pupils complete an activity then peer assess it to uncover how much they have learnt during the lesson. They then self-assess themselves against the lesson outcomes. Students who need further support set themselves additional homework to enhance learning of today’s lesson. EXTENSION ACTIVITIES: These are provided just in case any group requires them. COMPLETE AND READY TO USE: All resources are included in this excellent lesson, there is nothing for you but order the practical kit and deliver the lesson. THANK YOU FOR LOOKING: Thanks for looking, your positive feedback would be very much appreciated :) OTHER BARCLAYFOX SPACE LESSONS FOR STUDENTS BETWEEN 10 YEARS AND 14 YEARS OLD: * Solar system, stars and galaxies and the universe. * Geocentric and heliocentric solar system models * Seasons. * Gravity, weight and mass. * Exploring and observing the universe. * The moon’s phases. * Eclipse * Space travel * Observations of the universe * Day and night MORE HIGH QUALITY LESSONS: For more lessons that meet the new KS3 and KS4 specifications please type Barclayfox into the tes resources search engine to see all my lessons. Happy teaching ! Barclayfox.

High quality, complete and ready to use lesson. For use in KS3 and for lower and middle ability groups in KS4. ‘‘LENSES, FOCAL LENGTH AND TELESCOPES’’ - STUDENT OUTCOMES: By the end of the lesson students will be able to: * Identify convex and concave lenses. * Explain that lenses cause refraction and explain what it is. * Draw a ray diagram for convex and concave lenses. * Explain how to measure the focal length of a lens. * Explain how a telescope works. STARTER Pupils will start the lessons by thinking about the outcomes presented and then self- assessing their current understanding of what this lesson is going to cover. This engages the students as they are actively thinking, and this then facilitates self-assessment of their individual progress at the end of the lesson. MAIN and MAIN and MAIN.... This lesson is chunked into discrete sections to support learning and engender positive behaviour by keeping students interested and focused. There are various student activities such as: practical / experiment, differentiated worksheet for the practical, gap fill, paired work, literacy activities, numeracy (differentiation), focused questions with answers and differentiation, quiz, homework, self-assessment and peer assessment opportunities etc. This good variety of activities keeps pupils focused and happily learning. PLENARY: In the plenary activity pupils complete an activity then peer assess it to uncover how much they have learnt during the lesson. They then self-assess themselves against the lesson outcomes. Students who need further support set themselves additional homework to enhance learning of today’s lesson. EXTENSION ACTIVITIES: These are provided just in case any group requires them. COMPLETE AND READY TO USE: All resources are included in this excellent lesson, there is nothing for you but order the practical kit, photocopy the 2 differentiated activity sheets and deliver the lesson. THANK YOU FOR LOOKING: Thanks for looking, your positive feedback would be very much appreciated :) OTHER BARCLAYFOX SPACE LESSONS FOR STUDENTS BETWEEN 10 YEARS AND 14 YEARS OLD: * Solar system, stars and galaxies and the universe. * Geocentric and heliocentric solar system models * Seasons. * Gravity, weight and mass. * Exploring and observing the universe. * The moon’s phases. * Eclipse * Space travel * Observations of the universe * Day and night * Lenses, focal length and telescopes. MORE HIGH QUALITY LESSONS: For more lessons that meet the new KS3 and KS4 specifications please type Barclayfox into the tes resources search engine to see all my lessons. Happy teaching ! Barclayfox.

Great fun Christmas activities, complete and ready to use. Lots of engaging and fun activities and an excellent primary activity of building and firing straw** air powered rockets** in the classroom (no need to go outside). Please don’t stop reading! This is not a lesson only for science teachers - all instructions are in teh PPT and are simple for students to follow…it fantastic fun for all ! A story is woven and as part of the lesson the learners build rockets to save Christmas from Safcut - who is Santa’s evil brother. All instructions are included and the lesson teaches the learners almost automatically, this is NOT a lesson only for our friends the science teachers (although it’s excellent for them too!) - any of us can use this fun and imaginative lesson. Who is Safcut? What’s his plan? Can your class save Christmas? Lesson length: Fantastic fun ! Very flexible length, there are activities you can miss out and on the other hand there is a Christmas cracker based extension. So, the lesson can easily last anywhere between 0.5 hour and 1.5 hours depending on your needs. Better than a quiz: This is definitely not a Christmas quiz, it gets the learners out of their seats, keeps them focused and engaged as they work in teams building and creating. It’s a great lesson you can use with all ages from 6 to 16 and it won’t go out of date so you can use it for years to come, which makes it excellent value at this price ! Skills and learning: As well as being great fun and entertaining it is also educational and it includes: literacy, SMSC, team working skills, cooperation, physical building skills, questions with answers, activities with answers, play ball game, what engineers do, identify parts of a rocket, joke telling etc High quality lesson, great for teachers of any subject !!! Happy Christmas ! Happy teaching ! Barclayfox. . . . . . . Key words: Christmas: activities, Christmas activity, Xmas, saving Christmas, Santa’s evil brother, quiz, Xmas. Practical, team work, fun, entertaining, engaging, SMSC, literacy, happy kids, fun learning, rockets, air power, pressure, balloons, elf, elves, sleigh, reindeer, Christmas maths, Christmas English, Christmas PE, Christmas History, Christmas Geography, Christmas PSHE, Christmas RE, Christmas French, Christmas German, MFL, Christmas Sociology, Christmas Psychology, Christmas Physics, Christmas Chemistry, Christmas Biology, Christmas Design technology, Christmas product design, Christmas engineering, drama, ICT, media, computer science, art, business, EBacc, BTec, Progress 8.

Suitable for a wide variety of abilities and age groups (KS3 and KS4) WHAT’S INCLUDED: Unique Crossword - focuses on the 8 types of energy stores (types) 9-1 GCSE spec! Challenge mission - focuses on a mnemonic to help students recall all 8 stores Super challenge mission - students consider their own misconceptions about energy and what is and is not a store of energy. ALL answers are included. Barclayfox’s shop Or, perhaps have a glance at some of my high quality lessons on tes… Energy stores and transfers - complete and easy to use KS4 lesson Filration, mixtures and compounds - complete and easy to use KS3 lesson Happy teaching! Barclayfox. . . , End of text. , , , Search words: energy stores, energy types, energy, kinetic energy, gravitational potential energy, thermal energy, energy, energy, energy. chemical energy, elastic energy, magnetic energy, electrostatic energy, nuclear energy, thermal energy, KS4, KS3, energy stores, energy types, energy, kinetic energy, gravitational potential energy, thermal energy, energy, energy, energy. chemical energy, elastic energy, magnetic energy, electrostatic energy, nuclear energy, thermal energy, KS4, KS3, energy stores, energy types, energy, kinetic energy, gravitational potential energy, thermal energy, energy, energy, energy. chemical energy, elastic energy, magnetic energy, electrostatic energy, nuclear energy, thermal energy, KS4, KS3,

Energy stores and transfers activity (new GCSE 9-1). Get a FREE resource! Details below. This is a high quality, differentiated, easy to use and ready to use practical activity. ENERGY - THE LANGUAGE HAS CHANGED: Tes is littered with energy resources teaching to the old spec. it would be wrong to use these to teach with today (some even say they are new spec. 9-1 – but they not). Please don’t risk teaching your classes incorrectly ! This resource is an engaging energy circus practical experiment for students. It allows students to learn the subject properly and clearly with differentiated and unique activity sheets you cannot get anywhere else. WHY BUY THIS ? Many many hours of effort went in to writing these unique and accurate resources Tried and trusted, differentiated and complete. You can rely on this activity to give an accurate and superior learning experience. WHAT DO I GET? High ability activity sheet – for use during the circus practical. Medium/lower ability activity sheet – for use during the circus practical. Answer sheet. Equipment list (to give to your technicians) HOW DO I USE IT? Teach the students about the 8 stores and the 4 transfers and then let them do the highly engaging and accurate to 9-1 spec activities as the main part of your lesson. Then self or peer mark the sheets (answers provided). OR, FIND A FULLY COMPLETE AND READY TO GO LESSON HERE: Energy stores and transfers 9-1 spec AGES Activity for ages 11 to 16 where ever you live (so KS3/KS4 and USA grades 6 to 10). OTHER BARCLAYFOX RESOURCES: There are lots more great time saving lessons in my tes shop: Barclayfox’s shop Or, perhaps have a glance at some of my other high quality lessons… Specialised cells - KS3 bio Exothermic and endothermic - KS4 Chemistry Happy teaching! Barclayfox.

Energy stores and pathways (new GCSE 9-1). High quality, differentiated and complete lesson. Outcomes as below. Differentiated. Complete and ready to deliver. Easy to use Optimised - low teacher effort for great student results. Simple and clear. Engaging and varied. Unique. Correct to the new 9-1 GCSE spec (Beware! Many lessons on tes are not correct as they are the old specification and this includes some that claim to be 9-1). OUTCOMES I can: ALL: Understand and recall the 8 energy stores and 4 pathways. ALL: Understand that energy is not created or destroyed, only transferred. MOST: During a practical apply stores and pathways to describe energy transfers. SOME: Create energy transfer diagrams. Please do NOT buy this if you bought my other complete lesson on energy stores and transfers. Your feedback would be appreciated :) Happy teaching! Barclayfox. There are lots more great time saving lessons in my tes shop: Barclayfox’s shop Search words: New specification, new spec., new science spec, new science specification, new physics spec, 9-1, 9 – 1, GCSE, AQA, Edexcel, OCR, WJEC, IOP, energy, energy stores, energy types, energy transfers, energy pathways, energy carriers, not energy resources, joules, Joules, conservation of energy.

Isotopes - a complete KS4 / GCSE lesson Lesson objectives: * Understand atomic structure. * Know what isotopes, mass number, and atomic number are. * Describe nuclei of different atoms using mass number and atomic number in the form: X superscript m subscript p. * Use atomic number and mass number to calculate the number of protons, electrons and neutrons in an atom. * Draw the structures of specific atoms. The lesson contains: * Notes to help the teacher. * Help sheet (can be given to all students, or to only those who the plenary shows found the lesson difficult, or to students who missed the lesson). * Homework sheet with answers (you choose whether your learners need to do it). * Starter - picture puzzle. * Simple task where students self-assess themselves against each objective * Big question to get students thinking. * Scientific literacy. * Revision game - played in small teams - all answers are provided. * Questions – all answers are provided. * Gap fill activities - various, with answers. * Theory slides (carefully sculpted and interactive to avoid ‘death by powerpoint’) * Video clip link (carefully selected – saves you time searching the internet). * Plenary assessment quiz. * Student self-assessment versus objectives activity. Waste no more of your precious time searching, buy now! This lesson is part of a series, whilst they all work very well as standalone individual lessons you may wish to buy others from the series: 0. Bundle – contains all lessons (if available not all series are bundled) 1. History of the atom and the discovery of the nucleus. 2. Isotopes and Mass number and Atomic number. 3. Alpha, Beta and Gamma – ionising radiation. 4. Changes in the nucleus – decay equations 5. Activity and half life 6 to 14 Please see this power point for the rest of the list. Thank you, and happy teaching! Yours, Barclayfox.

A complete, and ready to deliver, KS4 lesson For USA - this lesson is for use between 8th and 10th grade. There is nothing for you to do but give it a quick look through and familiarise yourself with it. Lesson outcomes, students will be able to: * Draw “free body diagrams”. * Explain Newton’s first law. * Explain Newton’s third law. * Successfully calculate “resultant” forces. This carefully crafted lesson is over 40 slides long, and is full of learning activities as below: * Notes to help the teacher. * Starter - simple task where students self-assess against the objectives. * Activity sheet (unique) - simply print this slide for each student. * Activity sheet - answers. * Gap fill activity - all answers are provided. * Quiz with answers - using mini whiteboards (if available) * Questions – all answers are provided. * Peer or self marking * Theory slides (carefully sculpted, interspaced with learning activities, not ‘death by powerpoint’). * Play ball. * Paired work activities – all answers are provided. * Homework * Scientific Literacy activity. * Scientific Numeracy activity * Student self-assessment versus objectives activity – so learners can judge for themselves how much they have learnt. Please purchase this lesson, and leave a positive review. This lesson is part of a series, whilst they all work very well as standalone individual lessons you may wish to buy others from the series: 0. Bundles – contain 3 or more of these lessons at a discounted price (however please note not all my series are bundled). 1. Vectors and scalars. 2. Forces between objects (contact / non-contact and Newton’s 3rd law). 3. Forces and Newton’s third law (N3L). 4. Resultant forces, free body diagrams - This Lesson. 5. Forces and acceleration F=Ma 6. Required practical F=Ma 7 to 12 - please see list in this powerpoint Thank you, and happy teaching! Yours, Barclayfox.

A complete, and ready to deliver, KS4 For USA - this lesson is for use between 8th to 10th grade. Lesson objectives: * Describe the difference between contact forces & non-contact forces. * State examples of non-contact forces and relate them to real life scenarios. * Describe what a force field is and what affects it. * Understand how the strength of force is represented and how it changes with distance. This carefully crafted lesson is over 30 slides long, and is full of learning activities as below: * Notes to help the teacher. * Starter - simple task where students self-assess against the objectives. * Activity sheet (unique) - differentiated HA and LA and all answers are in the powerpoint. * Practical / student experiment. * Sorting activity * Gap fill activity on the activity sheet - all answers are provided. * Quiz with answers. * Questions – all answers are provided. * Peer marking / Self marking opportunities * Theory slides (carefully sculpted, interspaced with learning activities, not ‘death by powerpoint’). * Play ball. * Paired work activities – all answers are provided. * Homework * Scientific Literacy activity. * Student self-assessment versus objectives activity – so learners can judge for themselves how much they have learnt. * Extension activities - only for use if required. Please note: when searching for resources please type barclayfox into the search box/engine and it will show you all our resources. Please purchase this lesson, and leave a positive review. This lesson is part of a series, whilst they all work very well as standalone individual lessons you may wish to buy others from the series: 0. Bundles – contain 3 or more of these lessons at a discounted price (however please note not all my series are bundled). 1. Vectors and scalars. 2. Forces between objects, contact and non-contact forces. 3. Forces and Newton’s third law (N3L). 4 to 12 - please see list in this powerpoint Thank you, and happy teaching! Yours, Barclayfox.

A complete, and ready to deliver, high quality KS4 / GCSE lesson. (USA grades 9, 10 and 11) There is nothing for you to do but give it a quick look through and familiarise yourself with it. Lesson objectives: * Know the forces that oppose the driving force of a vehicle. * Define thinking distance, braking distance and stopping distance. * Describe factors affecting thinking distance and braking distance. * Understand why doubling speed doubles thinking distance but more than doubles braking distance. * Use the braking distance equation successfully. This carefully crafted lesson is over 40 slides long, and is full of learning activities as below: * Notes to help the teacher. * Starter - recall quiz. * Starter - simple task where students self-assess against the objectives. * Practical experiment. * Peer marking * Self marking * Theory slides (carefully sculpted, interspaced with learning activities, not ‘death by powerpoint’). * Questions – all answers are provided. * Differentiated questions - all answers are provided. * Play ball. * Video clip link (carefully selected – this alone can save you 20+ minutes of searching). * Paired work activities – all answers are provided. * Scientific Literacy activity. * Scientific Numeracy activity * SMSC * Plenary formative/summative assessment questions. * Student self-assessment versus objectives activity – so learners can judge for themselves how much they have learnt. As teachers we all work ridiculously long hours each week. Give yourself a break, spend some life with your wife / husband / children / friends / family by purchasing more lessons created by “Barclayfox” once they appear on TES. Please note: when searching for resources please type barclayfox into the search box/engine and it will show you all our resources. Please purchase this lesson, and leave a positive review. Thank you, and happy teaching! Yours, Barclayfox.

This lesson is 2 in a series of 5 that expertly and fully delivers all the points within the NEW KS3 specification SoW on the “light” topic. I find that this powerpoint and the activities keep lower level students engaged during the lesson while allowing differentiation for higher achievers. I'm sure you'll find it useful.  For more lessons designed to meet the new KS3 and KS4 specifications please type Barclayfox into the tes resources search engine to see all my lessons. STARTER Pupils will start the lessons by thinking/working in pairs and thinking back to the previous lesson to solve a gap fill. After revealing the title and lesson outcomes students self assess against their current understanding of this topic. Next there is a scientific literacy activity to ensure all students learn the key words required to understand this lesson. MAIN The slides then move on to lead the students onto the law of reflection. They will delve a little deeper into this by answering key questions from a diagram. MAIN Next, the lesson focuses on reflections in mirrors and how this works. Diagrams are clear and help get the key points across accurately. Students calculate the angle of incidence and self-assess. Next they look at specular and diffuse reflections. MAIN Students study a slide which shows a mirror and virtual image. This leads to a discussion and the revealing of how rays of light move and reflect off the mirror to create the virtual image. Student answer several questions focused on the above. MAIN Differentiation, Kinaesthetic up and about OR ray box practical - depending on which you feel is best matched to the abilities of your particular class. In the Kinaesthetic activity students follow the instructions and throw, or roll, a ball against a wall and compare the angles of incidence with their respective angles of reflection. In the light box practical they fire rays of light at a mirror and record incidence and reflection angles. These activities reinforce the law of reflection in student’s minds. PLENARY Each student self-assesses versus each of the objectives. EXTENSION ACTIVITIES These are provided just in case any group requires them. All resources are included in this great lesson, there is nothing for you to do but order the equipment for the class practical (simply hand your technician the printed off kit list.doc). Thank you for looking, your feedback is much appreciated! :) Lesson 2 in a series of 5. Happy teaching, Barclayfox.

This lesson is 4 in a series of 5 STARTER Pupils become engaged in the lessons by thinking/working in pairs to solve a picture puzzle to find out what today’s lesson is about. After revealing the title and lesson outcomes students self assess against their current understanding of this topic. Next there is a scientific literacy Q and A activity to ensure all students learn the key words required to understand this lesson. MAIN Homework is set and then dispersion is demonstrated by the teacher, this is an opportunity for differentiation as high ability groups can do a short practical. There is a Q and A activity to bring out the key points. MAIN Dispersion is linked to the colours in a rainbow and how a rainbow is created. The standard ROY G BIV mnemonic for remembering the spectrum is introduced. MAIN Students study a slide which shows the sun, an apple and a girl and asks them, how is it that the girl can see that the apple is red in colour? This leads to a discussion and the revealing of how some colours are absorbed and some reflected off the apple and into the girl’s eyes so that she sees the apple as red. This progresses further into what effect different colours of light has on the colours that we see when looking at objects. Students then apply their new understanding to complete an activity and peer mark their answers. MAIN Students complete a practical experiment to investigate the effect of coloured filters on the colours that they can see. Next they look at the three RGB primary colours and the effects of adding them together. PLENARY A quiz - peer marked - which uncovers how much they have learnt during the lesson. Students self assess their understanding of this topic now they have reached the end of the lesson, and compare it to their previously self-assessed understanding at the start of the lesson. Students who need further support set themselves homework. EXTENSION ACTIVITIES A variety of activities are provided just in case any of your groups requires them either this year or in future years. There is nothing for you to do but order the equipment for the class practical (simply hand your technician the printed off kit list.doc). Thank you for looking, your feedback is much appreciated! :) Lesson 4 in a series of 5. Happy teaching, Barclayfox.

This lesson is 3 in a series of 5 that expertly and fully delivers all the points within the NEW KS3 specification SoW on the “light” topic. I find that this powerpoint and its interesting activities keep lower level students engaged during the lesson while allowing differentiation for higher achievers. I’m sure you’ll find it useful. For more lessons designed to meet the new KS3 and KS4 specifications please type Barclayfox into the tes resources search engine to see all my lessons. STARTER Pupils will start the lessons by thinking/working in pairs to solve a picture puzzle to find out what today’s lesson is about. After revealing the title and lesson outcomes students self assess against their current understanding of this topic. Next there is a scientific literacy Q&A activity to ensure all students learn the key words required to understand this lesson. MAIN The slides then move on to lead the students into understanding refraction. TTN is introduced as a means of working out whether refraction with bend light towards or away from the normal. Students then undertake an activity and apply TTN to predict the way the light bends at various boundaries between various mediums, they then self-assess using the answers provided. MAIN Next, the lesson focuses on two types of lenses, concave and convex. Diagrams are clear and help get the key points across succinctly and accurately. Students are shown incident rays into a concave lens and then try to predict and draw the ray diagram for the refracted rays. MAIN Students do a class practical with ray boxes and glass blocks to investigate refraction. Students share their results and observations and then undertake a quiz to bring out the key points from the experiment. MAIN Students do a gap fill activity – this can be differentiated by providing or not providing the missing words, they then and self-assess or peer assess using the answers provided. MAIN Refractive index is introduced and students undertake some calculations based around refractive index. This is peer-assessed using the model answers provided. PLENARY Each student self-assesses versus each of the objectives and marks their progress on their progress bars. EXTENSION ACTIVITIES A variety of activities are provided just in case any of your groups requires them either this year or in future years. All resources are included in this great lesson, there is nothing for you to do but order the equipment for the class practical (simply hand your technician the printed off kit list.doc). Thank you for looking, your feedback is much appreciated! :) Lesson 3 in a series of 5. Happy teaching, Barclayfox.