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 3.1.2.5 - Balanced equations and associated calculations. Practical 1 - Make up a volumetric solution and carry out a simple acid–base titration. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 3.14 - Understand that the genome is the entire DNA of an organism and that a gene is a section of a molecule of DNA that codes for a specific protein. Specification Point 3.15 -Understand that the nucleus of a cell contains chromosomes on which genes are located. Complete set of Chapter 5 Lessons are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 1.2 - Understand how river landscapes change over the course of a river, with distinctive upland and lowland landforms, including the formation of valleys, interlocking spurs, waterfalls, meanders, oxbow lakes, floodplains and levees. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 5.3 - Understand the diversification of farming to generate new income streams: GM crops, specialist crops and food, organic farming, recreation and leisure. Complete set of Chapter 6 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.7.3.6 - Maintaining biodiversity. Complete set of Chapter 7 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 2.2 - Understand the abiotic and biotic characteristics of one named coastal ecosystem. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.3 - Understand the conflicts between different users of the coast, with different views on coastal management (conservation or development). Complete set of Chapter 2 Lectures are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 3.3 - Describe the structures of an insect-pollinated and a wind-pollinated flower and explain how each is adapted for pollination. Specification Point 3.4 - Understand that the growth of the pollen tube followed by fertilisation leads to seed and fruit formation. Specification Point 3.5 - Practical: investigate the conditions needed for seed germination. Specification Point 3.6 - Understand how germinating seeds utilise food reserves until the seedling can carry out photosynthesis. Specification Point 3.7 - Understand that plants can reproduce asexually by natural methods (illustrated by runners) and by artificial methods (illustrated by cuttings). Complete set of Chapter 5 Lessons are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 39 - FSH and LH. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 3.10B - Understand the roles of FSH and LH in the menstrual cycle. Complete set of Chapter 5 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 19 - Ventilation. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. 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 Worksheets are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.1 - Principles of organisation. Complete set of Chapter 2 Lectures are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 50 - Biodiversity. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 4.3B - Understand the term biodiversity. Specification Point 4.4B - Practical: investigate the distribution of organisms in their habitats and measure biodiversity using quadrats. Complete set of Chapter 6 Worksheets are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 6.1 - Use the following units: ampere (A), volt (V) and watt (W). Specification Point 6.2 - Know that magnets repel and attract other magnets and attract magnetic substances. Specification Point 6.3 - Describe the properties of magnetically hard and soft materials. Specification Point 6.4 - Understand the term magnetic field line. Specification Point 6.5 - Know that magnetism is induced in some materials when they are placed in a magnetic field. Specification Point 6.6 - Practical: investigate the magnetic field pattern for a permanent bar magnet and between two bar magnets. Specification Point 6.7 - Describe how to use two permanent magnets to produce a uniform magnetic field pattern. Complete set of Chapter 6 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 1.1 - Understand the hydrological cycle: characteristics, stores and transfers. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.86 - Describe how nervous and hormonal communication control responses and understand the differences between the two systems. Specification Point 2.87 - Understand that the central nervous system consists of the brain and spinal cord and is linked to sense organs by nerves. Specification Point 2.88 - Understand that stimulation of receptors in the sense organs sends electrical impulses along nerves into and out of the central nervous system, resulting in rapid responses. Specification Point 2.89 - Understand the role of neurotransmitters at synapses. Complete set of Chapter 4 Lessons are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 2.24 - Understand that a balanced diet should include appropriate proportions of carbohydrate, protein, lipid, vitamins, minerals, water and dietary fibre. Specification Point 2.25 - Identify the sources and describe the functions of carbohydrate, protein, lipid (fats and oils), vitamins A, C and D, the mineral ions calcium and iron, water and dietary fibre as components of the diet. Specification Point 2.26 - Understand how energy requirements vary with activity levels, age and pregnancy. Complete set of Chapter 2 Lessons are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.1 - Use a variety of energy units. Specification Point 4.2 - Describe energy transfers involving energy stores. Specification Point 4.3 - Use the principle of conservation of energy. Specification Point 4.4 - Know and use the relationship between efficiency, useful energy output and total energy output. Specification Point 4.5 - Describe a variety of everyday and scientific devices and situations, explaining the transfer of the input energy in terms of the above relationship, including their representation by Sankey diagrams. Complete set of Chapter 4 Lectures are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 3.22 - Understand that most phenotypic features are the result of polygenic inheritance rather than single genes. Specification Point 3.23 - Describe patterns of monohybrid inheritance using a genetic diagram. Specification Point 3.24 - Understand how to interpret family pedigrees. Specification Point 3.25 - Predict probabilities of outcomes from monohybrid crosses. Specification Point 3.26 - Understand how the sex of a person is controlled by one pair of chromosomes, XX in a female and XY in a male. Specification Point 3.27 - Describe the determination of the sex of offspring at fertilisation, using a genetic diagram. Complete set of Chapter 5 Lessons are available.