Companion PDF worksheet for Edexcel IGCSE Physics Lecture 1 - Distance and Speed. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 1.1 - Understand how to use some common units in physics. Specification Point 1.3 - Plot and explain distance−time graphs. Specification Point 1.4 - Know and use the relationship between average speed, distance moved and time taken. Specification Point 1.5 - Practical: investigate the motion of everyday objects such as toy cars or tennis balls. Complete set of Chapter 1 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 1 - States of Matter. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 1.1 - Understand the three states of matter in terms of the arrangement, movement & energy of the particles. Specification Point 1.2 - Understand the interconversions between the three states of matter in terms of: The names of the interconversions. How they are achieved. The changes in arrangement, movement & energy of the particles. Complete set of Chapter 1 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 1.22 - Practical: investigate how extension varies with applied force for helical springs, metal wires and rubber bands. Specification Point 1.23 - Know that the initial linear region of a force-extension graph is associated with Hooke’s law. Specification Point 1.24 - Describe elastic behaviour as the ability of a material to recover its original shape after the forces causing deformation have been removed. Complete set of Chapter 1 Lessons are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.1.1.1 - Eukaryotes and prokaryotes. Specification Point 4.1.1.2 - Animal and plant cells. Specification Point 4.1.1.5 - Microscopy. Practical 1 - Use a light microscope to investigate a selection of plant and animal cells. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.9 - Practical: Investigate food samples for the presence of glucose, starch, protein and fat. Complete set of Chapter 1 Lessons are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 1.1 - Understand how to use some common units in physics. Specification Point 1.3 - Plot and explain distance−time graphs. Specification Point 1.4 - Know and use the relationship between average speed, distance moved and time taken. Specification Point 1.5 - Practical: investigate the motion of everyday objects such as toy cars or tennis balls. Complete set of Chapter 1 Lessons are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.2.5 - Health issues. Specification Point 4.2.2.6 - The effect of lifestyle on some non-communicable diseases. Specification Point 4.2.2.7 - Cancer. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.11 - Know that a fuel is a substance that, when burned, releases heat energy. Specification Point 4.12 - Know the possible products of complete and incomplete combustion of hydrocarbons with oxygen in the air. Specification Point 4.13 - Understand why carbon monoxide is poisonous, in terms of its effect on the capacity of blood to transport oxygen. Specification Point 4.14 - Know that, in car engines, the temperature reached is high enough to allow nitrogen and oxygen from air to react, forming oxides of nitrogen. Specification Point 4.14 - Know that, in car engines, the temperature reached is high enough to allow nitrogen and oxygen from air to react, forming oxides of nitrogen. Specification Point 4.15 - Explain how the combustion of some impurities in hydrocarbon fuels results in the formation of sulphur dioxide. Specification Point 4.16 - Understand how sulphur dioxide and oxides of nitrogen contribute to acid rain. Specification Point 4.17 - Describe how long-chain alkanes are converted to alkenes and shorter-chain alkanes by catalytic cracking. Specification Point 4.18 - Explain why cracking is necessary, in terms of the balance between supply and demand for different fractions. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Points 2.34 and 2.35 - Understand how the process of respiration produces ATP in living organisms. Know that ATP provides energy for cells. Specification Points 2.36 and 2.37 - Describe the differences between aerobic and anaerobic respiration. Know the word equation and the balanced chemical symbol equation for aerobic respiration in living organisms. Specification Point 2.38 - Know the word equation for anaerobic respiration in plants and in animals. Specification Point 2.39 - Practical: investigate the evolution of carbon dioxide and heat from respiring seeds or other suitable living organisms. Complete set of Chapter 2 Lessons are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.3.8 - Aggression. The ethological explanation of aggression, including reference to innate releasing mechanisms and fixed action patterns. Evolutionary explanations of human aggression. Complete set of Chapter 15 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.1.1 - Monomers and polymers. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.46 - Describe the structure of the thorax, including the ribs, intercostal muscles, diaphragm, trachea, bronchi, bronchioles, alveoli and pleural membranes. Specification Point 2.47 - Understand the role of the intercostal muscles and the diaphragm in ventilation. Complete set of Chapter 3 Lessons are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 1.1 - Understand how living organisms share certain characteristics. Complete set of Chapter 1 Lessons are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.3.7 - Stress. The physiology of stress, including general adaptation syndrome, the hypothalamic pituitary adrenal system, the sympathomedullary pathway and the role of cortisol. Complete set of Chapter 14 Lectures are available.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 38 - Condensation Polymers. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 4.48C - Know that condensation polymerisation, in which a dicarboxylic acid reacts with a diol, produces a polyester and water. Specification Point 4.49C - Understand how to write the structural and displayed formula of a polyester, showing the repeat unit, given the formulae of the monomers from which it is formed including the reaction of ethanedioic acid and ethanediol. Specification Point 4.50C - Know that some polyesters, known as biopolyesters, are biodegradable. Complete set of Chapter 7 Worksheets are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.3.4 - Cognition and development. Baillargeon’s explanation of early infant abilities, including knowledge of the physical world; violation of expectation research. Complete set of Chapter 11 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.3.2 - Relationships. Virtual relationships in social media: self-disclosure in virtual relationships; effects of absence of gating on the nature of virtual relationships. Complete set of Chapter 9 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.3.3 - Gender. Sex and gender, sex-role stereotypes. Androgyny and measuring androgyny including the Bem Sex Role Inventory. Atypical gender development: gender dysphoria; biological and social explanations for gender dysphoria. Complete set of Chapter 10 Lectures are available.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 22 - Titrations. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.33C - Describe how to carry out an acid-alkali titration. Complete set of Chapter 5 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 13 - Covalent Bonding. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 1.44 - Know that a covalent bond is formed between atoms by the sharing of a pair of electrons. Specification Point 1.45 - Understand covalent bonds in terms of electrostatic attractions. Specification Point 1.46 - Understand how to use dot-and-cross diagrams to represent covalent bonds in a variety of molecules. Specification Point 1.47 - Explain why substances with a simple molecular structures are gases or liquids, or solids with low melting and boiling points. Specification Point 1.48 - Explain why the melting and boiling points of substances with simple molecular structures increase, in general, with increasing relative molecular mass. Specification Point 1.49 - Explain why substances with giant covalent structures are solids with high melting and boiling points. Specification Point 1.50 - Explain how the structures of diamond, graphite and fullerene influence their physical properties, including electrical conductivity and hardness. Specification Point 1.51 - Know that covalent compounds do not usually conduct electricity. Complete set of Chapter 3 Worksheets are available.