This engaging revision resource has been written with the sole aim of challenging students on their knowledge of both the Core and Supplement sections of TOPIC 2 of the Cambridge IGCSE Physics specification. The resource includes an engaging PowerPoint (68 slides) and accompanying worksheets, some of which are differentiated. The wide range of activities in the lesson which include exam questions with explained answers and quiz competitions will motivate the students whilst they evaluate and assess their knowledge of the content and recognise those areas which will require further attention. The lesson has been designed to cover as many parts of the topic as possible, but the following sub-topics have been given a particular focus: The properties of solids, liquids and gases Conduction, convection and radiation Melting and boiling points Boiling vs evaporation Specific latent heat The structure and action of liquid-in-glass thermometers The use of thermocouples Specific heat capacity The mathematical elements of the topic are covered throughout the lesson and students are given helpful hints to support them in structuring their answers. This resource can be used at the end of the topic or in the lead up to the mocks or the actual IGCSE terminal examinations.

This REVISION resource has been written with the aim of motivating the students whilst they are challenged on their knowledge of the content in TOPIC 4 (Natural selection and modification) of the Edexcel GCSE Biology specification. The resource contains an engaging and detailed PowerPoint (82 slides) and accompanying worksheets, some of which are differentiated to provide extra scaffolding to students when it is required. The wide range of activities have been designed to cover as much of topic 4 as possible but the following sub-topics have been given a particular focus: The discovery of human fossils Stone tools as evidence of human evolution Evolution by natural selection The development of antibiotic resistance in bacteria The three domain and five kingdom classification methods Genetic engineering Selective breeding The benefits and risks of genetic engineering and selective breeding for the growing population The use of fertilisers and biological control There is a large emphasis on mathematical skills in the new specification and these are tested throughout the lesson. This resource is suitable for use at the end of topic 4, in the lead up to mocks or in the preparation for the final GCSE exams.

This engaging and detailed lesson has been written to cover the content of points 7.6 & 7.7 (The hormonal and barrier methods of contraception) as detailed in the Edexcel GCSE Biology & Combined Science specifications. This is a topic which can be difficult to teach due to the awkwardness of a class or students believing that they already know all of the information without really knowing the detail which is laid out in the specification. With this in mind, a wide range of activities have been included in the lesson to maintain motivation whilst ensuring that this important detail is covered. Students will learn about a range of hormonal methods including oral contraceptives and progesterone patches and how these methods influence the menstrual cycle. Barrier methods are also discussed and their effectiveness considered. Time is taken to look at alternative methods such as abstaining from sexual intercourse before and after ovulation and sterilisation. Due to the clear link to the topic of the menstrual cycle, previous knowledge checks are written into the lesson and challenge the students on their knowledge of FSH, LH, oestrogen and progesterone. There are also mathematical skills check so that students are prepared for the added mathematical element in this course. This lesson has been written for GCSE-aged students who are studying on the Edexcel GCSE Biology or Combined Science courses but is suitable for younger students who are looking at contraception in their Science lessons

This resource contains an engaging and detailed lesson PowerPoint and accompanying worksheets which cover the content of both the Core and Supplement sections of topic 14.2 (Sense organs) as detailed in the CIE IGCSE Biology specification. Understanding checks are included at regular points throughout the lesson to allow the students to self-assess their progress and quiz competitions like SAY WHAT YOU SEE and LOOK into these WORDS introduce key terms in a fun and memorable way. The following content is covered across this resource: The function of the cornea, retina, lens, optic nerve and iris Identifying these structures and the pupil, fovea and blind spot on a diagram The roles of the rods and cones in the retina and their distribution Explain the pupil reflex in terms of the antagonistic action of the muscles in the iris Accommodation to view near and distant objects Sense organs and the stimuli to which they respond This lesson has been designed for GCSE-aged students who are studying the CIE IGCSE Biology course but is suitable for both younger and older students who are studying this organ

This fully-resourced lesson has been designed to cover the specification point 3.21B (understanding the term co-dominance) as detailed in topic 3 (Reproduction and inheritance) of the Pearson Edexcel IGCSE Biology specification. The lesson uses the inheritance of the ABO blood group system to demonstrate co-dominance. A potentially difficult topic, time has been taken to include guidance sections where students are walked through the interpretation of the different genotypes to find out the phenotypes as well as supporting them through the construction of genetic diagrams and working out the blood groups from pedigree trees. There is a real focus on genetic terminology such as allele, locus, genotype and phenotype so that the understanding is deep and students can use this if they choose to further their studies at A-level. This lesson has been designed for GCSE-aged students studying the Pearson Edexcel IGCSE Biology course but is also suitable for older students who are learning about codominance (and multiple alleles) at A-level

This resource has been designed to cover the higher tier content of specification point 7.8 as detailed in the Edexcel GCSE Biology & Combined Science specifications. The lesson takes the format of a day at a fertility clinic and students will see how three couples, who are at different stages of their currently unsuccessful journey to getting pregnant, are advised and the treatments that could be on offer to them. Discussion points are included throughout the lesson to encourage the students to talk about the Biology and to allow any misconceptions to be addressed if and when they arise. In addition, previous knowledge checks are regular so that the links between this topic and earlier ones such as the hormones in the menstrual cycle and contraception can be made. Students will be introduced to the abbreviation ART before learning how clomifene is used to treat infertility in women do not ovulate. Time is taken to explore alternative fertility drugs and students are challenged to explain why FSH and LH would be the reproductive hormones contained in these substances. The main focus of the lesson is IVF treatment and the main task culminates with students gaining a number of key points in the for and against argument before being challenged to continue this as a set homework in the form of an evaluation. Quiz competitions are used to introduce key terms in a fun and memorable way and the final task is a mathematical skills check where students will be able to compare the high number of multiple births that are associated with this treatment as compared to the number from natural births. This lesson has been designed for students studying the Edexcel GCSE Biology or Combined Science course but is also suitable for older students who are looking at this topic

This resource, which consists of an engaging and detailed PowerPoint and a differentiated worksheet, has been designed to cover the content in the supplement section of topic 14.4 in the CIE IGCSE Biology specification, specifically the control of blood glucose concentration and the symptoms and treatment of diabetes type I. A wide range of activities are found across the lesson which will engage and motivate the students whilst the important content is covered and understanding and previous knowledge checks are included at regular points so students can assess their progress. The following content is covered across this resource: The release of insulin by the pancreas when high glucose levels are detected The role of the liver and muscle cells in the conversion of glucose to glycogen Negative feedback in this homeostatic control mechanism Diagnosis and treatment of type I diabetes Type I diabetes as an autoimmune disease (link to topic 10) The release of glucagon and the role of the liver cells when blood glucose concentration is low As shown above, links are made to other topics where possible so students can recognise the importance of making connections between related subjects. This lesson has been designed for students studying on the CIE IGCSE Biology course but is suitable for older students who are looking at this topic at A-level and need to recall the key details

The engaging PowerPoint and accompanying differentiated worksheets which come as part of this lesson resource have been designed to cover the SUPPLEMENT section of topic 13.1 of the CIE IGCSE Biology specification which states that students should be able to describe the structure and function of the kidneys. Students will initially be introduced to the gross anatomy of the kidneys with the cortex and medulla and the associated ureter before moving on to the fine anatomy of the tubules and focusing on the key functions like ultrafiltration and selective reabsorption. Lots of discussion points and student discovery have been written into the lesson to encourage students to think about why a certain process takes place before attempting to explain it using the Biology. In addition, there are lots of understanding checks and prior knowledge checks so that students are challenged on their knowledge of previously learned topics such as active transport and the components of blood. The final task of the lesson challenges the students to use their knowledge of the formation of urea from earlier in topic 13 and combine it with what they have learnt in this lesson to arrange statements about the journey of this molecule into the right order This lesson has been designed for students who are studying the CIE IGCSE Biology course but is suitable for older students who are studying the kidney at A-level and want to recall some of the key details of the structure and function of this organ

This lesson has been designed to cover the content set out in specification point 2.5 (g) of the WJEC GCSE Biology specification which states that students should understand that hormones are chemical messengers which control many body functions. A wide range of activities have been written into the lesson with the aim of engaging and motivating the students whilst ensuring that the content is covered in detail. These activities include a number of quiz competitions which will challenge the students to identify an endocrine organ when presented with three organs as well as introducing them to the names of some of the hormones released by the pituitary gland. The following content is covered in this lesson: The location of the pituitary, adrenal and thyroid glands in the human body The location of the pancreas, ovaries and testes in the human body The hormones which are secreted by the endocrine glands The effects of the hormones on their target organs This lesson has been written for GCSE-aged students who are studying on the WJEC Biology course but it is suitable for younger students who are looking at this as one of the different organ systems

This engaging REVISION lesson has been designed to cover the content of topic 3 (Enzymes) of the CIE International A-level Biology specification. A wide range of activities have been written into the lesson to engage the students whilst they assess their understanding of the topic content. All of the exam questions contain detailed answers which students can use to identify missed marks and quiz competitions are used, like FROM NUMBERS 2 LETTERS (shown in the cover image) to recall key concepts and check on the finer details. The lesson has been planned to cover as much of the specification content as possible but the following sub-topics have received particular attention: Enzymes as globular proteins that act as biological catalysts Formation of the enzyme-substrate complex The lock and key theory and induced-fit hypothesis Competitive and non-competitive inhibitors The Michaelis-Menten constant The effect of changes in pH and temperature on the tertiary structure of the enzymes The immobilisation of enzymes using alginate Time has been taken in the design to ensure that links to other topics are made. For example, when checking the knowledge of the denaturation of enzymes due to pH and temperature, the bonds found in the tertiary structure are recalled and considered in depth.

This fully-resourced lesson explores the inheritance of genetic characteristics that involve multiple alleles and codominant alleles. The engaging and detailed PowerPoint and differentiated worksheets have been designed to cover the part of point 16.2 (b) of the CIE International A-level Biology specification which states that students should be able to use genetic diagrams to solve problems which involve codominance and multiple alleles. The main part of the lesson uses the inheritance of the ABO blood groups to demonstrate how the three alleles that are found at the locus on chromosome 9 and the codominance of the A and B alleles affects the phenotypes. Students are guided through the construction of the different genotypes and how to interpret the resulting phenotype. They are challenged to use a partially completed pedigree tree to determine the blood group for some of the family members and to explain how they came to their answer. To further challenge their ability to apply their knowledge, a series of questions about multiple alleles and codominance in animals that are not humans are used. All of the questions are followed by clear, visual mark schemes to allow the students to assess their progress and address any misconceptions

This fully-resourced lesson looks at the contribution of environmental and genetic factors to phenotypic variation. The engaging PowerPoint and accompanying worksheets have been designed to cover point 6.1.2 (a) of the OCR A-level Biology A specification which states that students should be able to demonstrate and apply an understanding of how mutations and meiosis and the lack of availability of ions can cause variation within a species. Students are challenged at the start of the lesson to recognise the terms phenotype and species from their definitions in order to begin a discussion on the causes of the phenotypic variation within a species. Moving forwards, students will recall that mutations are the primary source of genetic variation and time is taken to look at the effect of gene and chromosome mutations. Gene mutations were covered earlier in module 6 so these tasks act as a prior knowledge check as students have to recognise the different types of gene mutations and explain their effects on the primary structure with reference to the genetic code. These prior knowledge checks are found throughout the lesson and challenge the knowledge of other topics that include photosynthesis and meiosis. The karyotype of an individual who has Down syndrome is used to introduce chromosome mutations and students will be introduced to the different types, with a focus on non-disjunction. The key events of meiosis that produce variation (crossing over and independent assortment) are explored and students will be given a mathematical formula to use to calculate the number of chromosome combinations in gametes and in the resulting zygote. The final part of the lesson looks at chlorosis and how an environmental factor can prevent the express of a gene. If you would like a lesson that goes into chromosome mutations in even greater detail, please search for the uploaded lesson on that topic which complements this lesson

This lesson focuses on the degenerate nature of the genetic code and explains how a mutation may not result in a change to the sequence of amino acids. The PowerPoint has been designed to cover the first part of point 4.3 of the AQA A-level Biology specification and it makes links to the upcoming lesson on gene mutations. The lesson begins by introducing the terms near universal and non-overlapping in addition to degenerate. A quick quiz competition is used to generate the number 20 so that the students can learn that there are 20 proteinogenic amino acids in the genetic code. This leads into a challenge, where they have to use their prior knowledge of DNA to calculate the number of different DNA triplets (64) and the mismatch in number is then discussed and related back to the lesson topic. Moving forwards, base substitutions and base deletions are briefly introduced so that they can see how although one substitution can change the primary structure, another will change the codon but not the encoded amino acid. The lesson concludes with a brief look at the non-overlapping nature of the code so that the impact of a base deletion (or insertion) can be understood when covered in greater detail in topic 8. This lesson has been specifically designed to tie in with the other lessons from topic 4.3 on gene mutations, chromosome mutations and meiosis.

This fully-resourced lesson is clear and concise and has been written to explain how the inheritance of two or more genes that have loci on the same chromosome demonstrates linkage. The engaging PowerPoint and associated resource have been designed to cover point 3.8 (i and ii) of the Pearson Edexcel A-level Biology (Salters Nuffield) specification which states that students should know the meaning of a gene locus and understand the linkage of genes on a chromosome. 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 fully-resourced lesson has been designed to cover point 8.4 of the Pearson Edexcel A-level Biology A (Salters Nuffield) specification that states that students should know the structures and function of synapses in nerve impulse transmission. The majority of the lesson uses the cholinergic synapse as the example but other neurotransmitters are considered to provide the students with a wider view of this topic and to make links to specification point 8.15 The lesson begins by using a version of the WALL (as shown in the cover image) which asks the students to group 12 words into three groups of 4. Not only will this challenge their prior knowledge from topics earlier in this module but it will also lead to the discovery of four of the structures that are found in a synapse. Moving forwards, students are introduced to aectylcholine as the neurotransmitter involved at cholinergic synapses and they will start to add labels to the structures found in the pre-synaptic bulb. Time is taken to focus on certain structures such as the voltage gated channels as these types of channel were met previously when looking at the depolarisation of a neurone. There is plenty of challenge and discovery as students are pushed to explain why organelles like mitochondria would be found in large numbers in the bulb. With this process being a cascade of events, a bullet point format is used to ensure that the key content is taken in by the students and again key points like exocytosis and the action of acetylcholinesterase are discussed further. The final part of the lesson challenges the application aspect of the specification as students are introduced to unfamiliar situations in terms of synapses with new drugs like MDMA and are asked to work out and explain how these affect the nervous transmission. Understanding checks and prior knowledge checks are included throughout the lesson so that students can not only assess their progress against the current topic but also see whether they can make links to earlier topics.

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 clear and concise lesson explores the importance of coenzymes in cellular respiration as detailed in point 5.2.2 (f) of the OCR A-level Biology A specification. Students encountered coenzymes in module 2.1.4 as well as looking at the roles of NAD, CoA and FAD whilst learning about glycolysis, the link reaction and Krebs cycle earlier in this module. Therefore this lesson was designed to check on their understanding of the importance of these roles and goes on to explain how the transport of the protons and electrons to the mitochondrial cristae is key for the production of ATP. This lesson has been written to tie in with the other uploaded lessons in module 5.2.2 which include the mitochondria, glycolysis, the link reaction and the Krebs cycle

This detailed lesson looks at each of the stages of aerobic respiration and explains how this reaction is a multi-stepped process where each step is controlled by an enzyme. The engaging PowerPoint and accompanying resource have been designed to cover points 7.3 (i) and (ii) of the Pearson Edexcel A-level Biology A (Salters Nuffield) specification. The lesson begins with an introduction to glycolysis and students will learn how this first stage of aerobic respiration is also the first stage when oxygen is not present. This stage involves 10 reactions and an opportunity is taken to explain how each of these reactions is catalysed by a different, specific intracellular enzyme. A version of “GUESS WHO” challenges students to use a series of structural clues to whittle the 6 organelles down to just the mitochondrion so that they can learn how the other three stages take place inside this organelle. Moving forwards, the key components of the organelle are identified on a diagram. Students are introduced to the stages of respiration so that they can make a link to the parts of the cell and the mitochondria where each stage occurs. Students will learn that the presence of decarboxylase and dehydrogenase enzymes in the matrix along with coenzymes and oxaloacetate allows the link reaction and the Krebs cycle to run and that these stages produce the waste product of carbon dioxide. Finally, time is taken to introduce the electron transport chain and the enzyme, ATP synthase, so that students can begin to understand how the flow of protons across the inner membrane results in the production of ATP and the atmospheric oxygen being reunited with hydrogen.