This is a fully-resourced lesson that covers the content of specification point 15.1 (k) of the CIE International A-level Biology specification which states that students should be able to explain the sliding filament model of muscular contraction. The wide range of activities included in the lesson will engage and motivate the students whilst the understanding and previous knowledge checks will not only allow them to assess their progress but also challenge them to make links to other Biology topics. The start of the lesson is designed to encourage the students to consider how a sarcomere can narrow but the lengths of the myofilaments can remain the same. In doing so, they will be introduced to the idea of the sliding filament model and the main task of the lesson involves the formation of a bullet point description of this model where one event is the trigger for the next. Time is taken during this section to focus on the involvement of the calcium ions but also ATP and the idea of the sources of this molecule, including creatine phosphate, are discussed in more detail later in the lesson. The final part of the lesson involves students having to apply their knowledge by describing the effect on muscle contraction when a part of a structure is unable to function correctly. This lesson has been designed for students studying the CIE International A-level Biology course and ties in well with the other uploaded lessons on this topic, particularly the lesson which covers the ultrastructure of striated muscle

This fully-resourced lesson looks at how heart rate is controlled by the cardiovascular control centre in the medulla oblongata. The engaging and detailed PowerPoint and accompanying resources have been designed to cover the first part of point 7.9 (ii) of the Pearson Edexcel A-level Biology A (Salters Nuffield) specification but also ties in well with previously covered topics and provides a good introduction to control systems which are covered later in topic 7 and 8. This lesson begins with a prior knowledge check where students have to identify and correct any errors in a passage about the conduction system of the heart. This allows the SAN to be recalled as this structure play an important role as the effector in this control system. Moving forwards, the three key parts of a control system are recalled as the next part of the lesson will specifically look at the range of sensory receptors, the coordination centre and the effector. Students are introduced to chemoreceptors and baroreceptors and time is taken to ensure that the understanding of the stimuli detected by these receptors is complete and that they recognise the result is the conduction of an impulse along a neurone to the brain. A quick quiz is used to introduce the medulla oblongata as the location of the cardiovascular centre. The communication between this centre and the SAN through the autonomic nervous system can be poorly understood so detailed explanations are provided and the sympathetic and parasympathetic divisions compared. The final task challenges the students to demonstrate and apply their understanding by writing a detailed description of the control and this task has been differentiated three ways to allow differing abilities to access the work

This detailed, concise lesson describes and explains how the electron transport chain and chemiosmosis are involved in the synthesis of ATP by oxidative phosphorylation. The PowerPoint has been designed to cover point 7.6 of the Pearson Edexcel A-level Biology A (Salters Nuffield) specification and also looks at the role of the enzyme, ATP synthase. The lesson begins with a discussion about the starting point of the reaction. In the previous stages, the starting molecule was the final product of the last stage but in this stage, it is the reduced coenzymes which release their hydrogen atoms. Moving forwards, the process of oxidative phosphorylation is covered in 7 steps and at each point, key facts are discussed and explored in detail to enable a deep understanding to be developed. Students will see how the proton gradient is created and that the flow of protons down the channel associated with ATP synthase results in a conformational change and the addition of phosphate groups to ADP. Understanding checks are included throughout the lesson to enable the students to assess their progress. This lesson has been written to tie in with the other uploaded lessons on glycolysis, the Link reaction and Krebs cycle and anaerobic respiration.

This fully-resourced lesson looks at the details of glycolysis as the first stage of aerobic and anaerobic respiration and explains how the sequence of reactions results in glucose being converted to pyruvate. The engaging PowerPoint and accompanying differentiated resources have been designed to cover the second part of point 5.2 of the AQA A-level Biology specification which states that students should know glycolysis as the phosphorylation of glucose and the production and subsequent oxidation of triose phosphate. The lesson begins with the introduction of the name of the stage and then explains how the phosphorylation of the hexoses and the production of the ATP, coenzymes and pyruvate are the stages that need to be known for this specification. Time is taken to go through each of these stages and key points such as the use of ATP in phosphorylation are explained so that students can understand how this affects the net yield. A quick quiz competition is used to introduce NAD and the students will learn that the reduction of this coenzyme, which is followed by the transport of the protons and electrons to the cristae for the electron transport chain is critical for the overall production of ATP. Understanding checks, in a range of forms, are included throughout the lesson so that students can assess their progress and any misconceptions are immediately addressed. This lesson has been written to tie in with the other uploaded lessons on anaerobic respiration and the different stages of aerobic respiration (the Link reaction, Krebs cycle and oxidative phosphorylation)

This engaging and fully-resourced lesson looks at the effects of stabilising, directional and disruptive selection as the three main types of selection. The PowerPoint and accompanying resources have been designed to cover point 17.2 (b) of the CIE International A-level Biology specification which states that students should be able to identify each type of selection by its effect on different phenotypes. The lesson begins with an introduction to the mark, release, recapture method to calculate numbers of rabbits with different coloured fur in a particular habitat. This method is covered later in topic 18 so this section of the lesson is designed purely to generate changes in numbers of the organisms. 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 detailed and fully-resourced lesson describes and explains the pressure changes in the heart and arteries and the role of the valves movements in the cardiac cycle. The PowerPoint and accompanying resources have been designed to cover point 3.1.2 (f) of the OCR A-level Biology A specification and also covers the use of the equation stroke volume x heart rate to calculate cardiac output The start of the lesson introduces the cardiac cycle as well as the key term systole, so that students can immediately recognise that the three stages of the cycle are atrial and ventricular systole followed by diastole. Students are challenged on their prior knowledge of the structure of the heart as they have to name and state the function of an atrioventricular and semi-lunar valve from an internal diagram. This leads into the key point that pressure changes in the chambers and the major arteries results in the opening and closing of these sets of valves. Students are given a description of the pressure change that results in the opening of the AV valves and shown where this would be found on the graph detailing the pressure changes of the cardiac cycle. They then have to use this as a guide to write descriptions for the closing of the AV valve and the opening and closing of the semi-lunar valves and to locate these on the graph. By providing the students with this graph, the next part of the lesson can focus on explaining how these changes come about. Students have to use their current and prior knowledge of the chambers and blood vessels to write 4 descriptions that cover the cardiac cycle. Moving forwards, the students are introduced to the stroke volume and meet normative values for this and for resting heart rate. This will lead into the calculation for cardiac output and a series of questions are used to test their ability to apply this equation as well as to calculate the percentage change which is a commonly assessed mathematical skill. This lesson has been written to tie in with the other uploaded lessons on the topics detailed in module 3.1.2 (Transport in animals)

This fully-resourced REVISION lesson has been written to challenge the students on their knowledge of the content of topic 6 (Magnetism and electromagnetism) of the Pearson Edexcel IGCSE Physics specification. The engaging PowerPoint and accompanying resources will motivate the students whilst they assess their understanding of the content and identify any areas which may require further attention. The wide range of activities have been written to cover as much of the topic as possible but the following specification points have been given particular focus: Magnets attract and repel other magnets and attract magnetic materials Magnetism is induced in some materials when they are placed in a magnetic field The construction of an electromagnet Use of the left-hand rule to predict the direction of the resulting force in a motor How the motor effect is applied in a loudspeaker The structure and function of a transformer Know and use the relationship between input and output voltages and the turns ratio Know and use the relationship between input and output power for 100% efficient transformer Explain the use of a step-up transformer in the transmission of electrical energy Quiz rounds such as “THE BIG REVEAL” and “WHAT EXACTLY AM I” are used to test the students on their knowledge of key terms and structures and all of the tasks are differentiated to allow students of differing abilities to access the work

This is a fully-resourced revision lesson that has been written to include a wide range of activities that challenge the students on their knowledge of astrophysics as detailed in topic 8 of the Pearson Edexcel IGCSE Physics specification. The numerous quiz rounds which include “Shine a LIGHT on any ERRORS” will engage and motivate their students whilst they assess their understanding of the content and recognise any areas that require further attention. The lesson has been designed to include as many of the specification points as possible but the following have been given particular attention: Understanding of the terms Solar system, galaxy and universe Gravitational field strength varies on different planets Gravitational force causes the Moon to orbit the Earth and the planets to orbit the Sun Use the relationship between orbital speed, orbital radius and time period Evolution of stars of a similar mass to our Sun and of stars with larger masses The evidence that supports the Big Bang theory The change in the frequency and wavelength of a wave if the source of the wave is moving in relation to the observer Red-shift as evidence of an expanding universe This topic contains a number of principles or theories which can be poorly understood by students so extra time has been taken to guide them in the formation of descriptions and explanations.

This fully-resourced revision lesson challenges the students on their knowledge of the content detailed in topic 3 (Particle model of matter) of the AQA GCSE Physics specification. The wide range of activities which include exam questions with clear explanations will allow them to assess their understanding of the content and to recognise those areas which require further attention. The lesson has been designed to cover as much of the topic as possible but the following specification points have been given particular attention: Recall and apply the equation to calculate density Explaining differences in density between states of matter Internal energy and the result of heating the particles in a system Applying the equation to calculate the specific heat capacity Understanding that temperature does not change during changes of state Applying the equation to calculate the specific latent heat Explaining the qualitative relationship between the temperature of a gas and its pressure Applying the equation that links pressure, volume and a constant The engaging PowerPoint guides students on the use of key mathematical skills to aid success with the various calculations

This fully-resourced revision lesson challenges the students on their knowledge of the content detailed in topic 1 (Matter) of the OCR GCSE Physics specification. The wide range of activities, which include exam questions with clear explanations, will allow them to assess their understanding of the content and to recognise those areas which require further attention. The lesson has been designed to cover as much of the module as possible but the following specification points have been given particular attention: Recall and apply the equation to calculate density Describe how and why the atomic model has changed over time Describe the atom and recall the typical size Explain the difference in density between different states of matter Describe how mass is conserved when physical changes occur Describe how physical changes differ from chemical changes Define the term specific heat capacity and distinguish between that and specific latent heat Applying the equation to calculate the specific heat capacity Understanding that temperature does not change during changes of state Applying the equation to calculate the specific latent heat Explaining the qualitative relationship between the temperature of a gas and its pressure Applying the equation that links pressure, volume and a constant Explain how doing work on a gas can increase its temperature Explain why pressure in a liquid varies with depth Most of the resources are differentiated to allow students of differing abilities to access the work and be challenged and the PowerPoint guides the students through the range of mathematical skills which are tested in this module

This revision lesson is fully-resourced and has been written to allow students to assess their understanding of the content detailed in topic 15 (Forces and matter) of the Pearson Edexcel GCSE Physics specification. The engaging and detailed PowerPoint uses a wide range of activities, which includes exam-style questions with clear explanations of the answers, to enable the students to identify those areas which require further attention before the mock or terminal examinations. The lesson was designed to cover as much of the topic as possible but the following points have received particular attention: The difference between elastic and inelastic distortion Recall and use the equation for linear elastic distortion Use the equation to calculate the work done in stretching Describe the relationship between force and extension Recall and use the equation for pressure Describe how pressure in fluids increases with depth and density Use the equation to calculate the magnitude of pressure in liquids Explain that an object in a fluid is subjected to upthrust Calculate the depth at which an object floats Due to the heavy mathematical content of this specification and particularly this topic, a lot of the activities challenge the students on their ability to recall and apply the equations. Step-by-step guides and differentiated resources are used to allow students of differing abilities to access the work.

This revision lesson has been filled with activities that will challenge the students on their knowledge and understanding of the content detailed in topic 9 of the Pearson Edexcel GCSE Physics specification. The wide range of activities in the engaging PowerPoint and accompanying resources will check on the knowledge of the forces and their effects topic and allow the students to recognise those areas which need further attention before the mock or terminal GCSE exams. This resource has been designed to cover as much of topic 9 as possible but the following points have received particular attention: What happens when objects can interact at a distance without contact What happens when objects can interact by contact Explain the difference between vector and scalar quantities using examples Draw free body diagrams Recall and use the equation to calculate the moment of a force Recall and use the principle of moments in situations where rotational forces are in equilibrium Explain ways of reducing unwanted energy transfer through lubrication The main task of the lesson which challenges students to use the principle of moments has been differentiated so that differing abilities can access the work

This fully-resourced revision lesson contains a wide range of activities that will challenge the students on their knowledge and understanding of the content detailed in the CORE and SUPPLEMENT sections of topic P2 (Work, energy and power) of the CIE IGCSE Combined Science specification. These activities include exam style questions which will allow the students to assess their progress against the clearly explained answers. There is also a quiz that runs throughout the course of the lesson and this has been designed to maintain engagement and motivation. The following specification points have been covered in this lesson: Recall and use the equation to calculate work done Demonstrate an understanding that work done = energy transferred Understand that an object may have energy due to its motion or position Recall and use the equations to calculate kinetic and gravitational potential energy Recognise the ways that energy is transferred during events and processes Apply the conservation of energy Recall and use the equation to calculate power Distinguish between renewable and non-renewable sources of energy Describe how electricity is obtained from the tides, hydroelectric power and nuclear fission One of the main tasks of the lesson, which challenges the students to apply the law of the conservation of energy, has been differentiated so that differing abilities can access the work

This is a fully-resourced lesson which uses exam-style questions, quiz competitions, quick tasks and discussion points to challenge students on their understanding of topics C1 - C5, that will assessed on PAPER 3. It has been specifically designed for students on the AQA GCSE Combined Science course who will be taking the FOUNDATION TIER examinations but is also suitable for students taking the higher tier who need to ensure that the fundamentals are known and understood. The lesson has been written to cover as many sub-topics as possible, but the following have been given particular attention: The relative mass and charge of protons, electrons and neutrons Using the Periodic table to calculate numbers of the sub-atomic particles Writing elements and compounds in chemical symbol equations Covalent structures Drawing dot and cross diagrams for covalent and ionic compounds The transfer of electrons during the formation of an ionic bond Properties of metals and non-metals States of matter Conservation of mass and balancing symbol equations Calculating the relative formula mass Electrolysis of molten salts and aqueous solutions Extraction of metals In order to maintain challenge whilst ensuring that all abilities can access the questions, the majority of the tasks have been differentiated and students can ask for extra support when they are unable to begin a question. Step-by-step guides have also been written into the lesson to walk students through some of the more difficult concepts such as drawing dot and cross diagrams and writing chemical formulae. Due to the extensiveness of this revision lesson, it is estimated that it will take in excess of 3/4 teaching hours to complete the tasks and therefore this can be used at different points throughout the course as well as acting as a final revision before the PAPER 3 exam.