Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.4.1.1 - The photosynthetic reaction. Specification Point 4.4.1.3 - Uses of glucose from photosynthesis. Complete set of Chapter 4 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.6.2.3 - Selective breeding. Complete set of Chapter 6 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.6.1.5 - DNA structure. Complete set of Chapter 6 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.1 - Understand the physical processes at work on the coast: marine processes, weathering and mass movement. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.1 - Understand the causes of tropical cyclone hazards, including ocean temperature, atmospheric pressure, wind shear and Coriolis force. Specification Point 3.1 - Understand the causes of volcanic and earthquake hazards, including the role of plate boundaries and hotspots. Complete set of Chapter 3 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.1 - Understand the classification of employment by economic sector (primary, secondary, tertiary and quaternary) and the reasons for the differences in the employment structures in countries at different levels of development. Complete set of Chapter 5 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.3 - Understand that energy demand and production varies globally and is affected by a range of factors: population growth, increased wealth and technological advances. Specification Point 4.3 - Understand that non-renewable and renewable sources of energy have advantages and disadvantages for people and the environment. Complete set of Chapter 5 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 7.1 - Understand the distributions and characteristics of the world’s fragile environments. Complete set of Chapter 8 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 6.1 - Understand factors affecting the rate of urbanisation and the emergence of megacities. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.1 - Approaches in psychology. The psychodynamic approach: the role of the unconscious, the structure of personality, that is Id, Ego and Superego, defence mechanisms including repression, denial and displacement, psychosexual stages. Complete set of Chapter 5 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.1 - Approaches in psychology. Humanistic psychology: free will, self-actualisation and Maslow’s hierarchy of needs, focus on the self, congruence, the role of conditions of worth. The influence on counselling psychology. Complete set of Chapter 5 Lectures are available.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 17 - Group 7 Elements. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.5 - Know the colours, physical states (at room temperature) and trends in physical properties of chlorine, bromine and iodine. Specification Point 2.6 - Use knowledge of trends in group 7 to predict the properties of other halogens. Specification Point 2.7 - Understand how displacement reactions involving halogens and halides provide evidence for the trend in reactivity in group 7. Specification Point 2.8C - Explain the trend in reactivity in group 7 in terms of electronic configurations. Complete set of Chapter 4 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.5 - Know the colours, physical states (at room temperature) and trends in physical properties of chlorine, bromine and iodine. Specification Point 2.6 - Use knowledge of trends in group 7 to predict the properties of other halogens. Specification Point 2.7 - Understand how displacement reactions involving halogens and halides provide evidence for the trend in reactivity in group 7. Specification Point 2.8C - Explain the trend in reactivity in group 7 in terms of electronic configurations. Complete set of Chapter 4 Lessons are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.3.1 - Scientific Processes. Aims: stating aims, the difference between aims and hypotheses. Hypotheses: directional and non-directional. Sampling: the difference between population and sample; sampling techniques including: random, systematic, stratified, opportunity and volunteer; implications of sampling techniques, including bias and generalisation. Complete set of Chapter 7 Lectures 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 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.

Companion PDF worksheet for Edexcel IGCSE Physics Lecture 11 - Circuits Part 1. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.7 - Explain why a series or parallel circuit is more appropriate for particular applications, including domestic lighting. Specification Point 2.8 - Understand how the current in a series circuit depends on the applied voltage and the number and nature of other components. Specification Point 2.9 - Describe how current varies with voltage in wires, resistors, metal filament lamps and diodes, and how to investigate this experimentally. Specification Point 2.10 - Describe the qualitative effect of changing resistance on the current in a circuit. Specification Point 2.11 - Describe the qualitative variation of resistance of light-dependent resistors (LDRs) with illumination and thermistors with temperature. Specification Point 2.12 - Know that lamps and LEDs can be used to indicate the presence of a current in a circuit. Specification Point 2.13 - Know and use the relationship between voltage, current and resistance. Complete set of Chapter 2 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.7 - Explain why a series or parallel circuit is more appropriate for particular applications, including domestic lighting. Specification Point 2.8 - Understand how the current in a series circuit depends on the applied voltage and the number and nature of other components. Specification Point 2.9 - Describe how current varies with voltage in wires, resistors, metal filament lamps and diodes, and how to investigate this experimentally. Specification Point 2.10 - Describe the qualitative effect of changing resistance on the current in a circuit. Specification Point 2.11 - Describe the qualitative variation of resistance of light-dependent resistors (LDRs) with illumination and thermistors with temperature. Specification Point 2.12 - Know that lamps and LEDs can be used to indicate the presence of a current in a circuit. Specification Point 2.13 - Know and use the relationship between voltage, current and resistance. Complete set of Chapter 2 Lessons are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.1 - Use the following units: ampere, coulomb, joule , ohm, second, volt and watt. Specification Point 2.2 - Understand how the use of insulation, double insulation, earthing, fuses and circuit breakers protects the device or user in a range of domestic appliances. Specification Point 2.3 - Understand why a current in a resistor results in the electrical transfer of energy and an increase in temperature, and how this can be used in a variety of domestic contexts. Specification Point 2.14 - Know that current is the rate of flow of charge. Complete set of Chapter 2 Lessons are available.

Companion PDF worksheet for Edexcel IGCSE Physics Lecture 14 - Waves. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 3.1 - Use the following units: degree (°), hertz (Hz), metre (m), metre/second (m/s) and second (s). Specification Point 3.2 - Explain the difference between longitudinal and transverse waves. Specification Point 3.3 - Know the definitions of amplitude, wavefront, frequency, wavelength and period of a waves. Specification Point 3.4 - Know that waves transfer energy and information without transferring matter. Specification Point 3.5 - Know and use the relationship between the speed, frequency and wavelength of a wave. Specification Point 3.6 - Use the relationship between frequency and time period. Complete set of Chapter 3 Worksheets are available.