Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 3.11 - Describe the role of the placenta in the nutrition of the developing embryo. Specification Point 3.12 - Understand how the developing embryo is protected by amniotic fluid. Specification Point 3.13 - Understand the roles of oestrogen and testosterone in the development of secondary sexual characteristics. Complete set of Chapter 5 Lessons are available.

Complete set of concise, modern presentations for AQA A Level Biology (7401 and 7402) Chapter 6 - The Response of Organisms. Contains colour coded specification points. Eight presentations included: 42 - Survival and Response 43 - Receptors and Effectors 44 - The Control of Heart Rate 45 - Nerves and Synapses 46 - Muscles 47 - Homeostasis 48 - Controlling Blood Glucose 49 - The Kidneys

Powerpoint lecture covering the following in a modern, concise format: Specification Point 2.2 - Understand how small and large scale coastal ecosystems are threatened by people and their activities. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 1.1 - Understand the features of a drainage basin: source, watershed, channel network and mouth. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 1.3 - Understand the reasons for variations in water quality, including pollution, and the storage and supply of clean water. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 5.3 - Understand the range of possible strategies aimed at making rural living more sustainable and improving the quality of life for the chosen rural environment. Complete set of Chapter 6 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 5.3 - Understand the role of different groups of people in managing the social, economic and environmental challenges within the chosen rural environment. Complete set of Chapter 6 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.1.1 - Social influence. Explanations of resistance to social influence, including social support and locus of control. Minority influence including reference to consistency, commitment and flexibility. The role of social influence processes in social change. Complete set of Chapter 1 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 6.3 - Understand the development of the rural-urban fringe: housing estates, retail, business and science parks, industrial estates, and the greenfield versus brownfield debate. Complete set of Chapter 7 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 5.1 - Understand examples of goods and services provided for people by natural ecosystems (timber, tourism, food, energy, water resources, health services, natural protection and climate regulation). Specification Point 5.1 - Understand how humans use, modify and change ecosystems and rural environments to obtain food through farming systems (arable/pastoral, commercial/subsistence, intensive/extensive). Complete set of Chapter 6 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 6.3 - Understand the role of different groups of people (planners, politicians, property developers and industrialists) in managing the social, economic and environmental challenges in the chosen urban area. Complete set of Chapter 7 Lectures are available.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 21 - Acids and Alkalis. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.28 - Describe the use of litmus, phenolphthalein and methyl orange to distinguish between acidic and alkaline solutions. Specification Point 2.29 - Understand how the pH scale can be used to classify solutions as strongly acidic, weakly acidic, neutral, weakly alkaline and strongly alkaline. Specification Point 2.30 - Describe the use of universal indicator to measure the approximate pH value of an aqueous solution. Specification Point 2.31 - Know that acids in aqueous solution are a source of hydrogen ions and alkalis in a aqueous solution are a source of hydroxide ions. Specification Point 2.32 - Know that alkalis can neutralise acids. Complete set of Chapter 5 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 23 - Acids, Bases and Salts. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 2.34 - Know the general rules for predicting the solubility of ionic compounds in water. Specification Point 2.35 - Understand acids and bases in terms of proton transfer. Specification Point 2.36 - Understand that an acid is a proton donor and a base is a proton acceptor. Specification Point 2.37 - Describe the reactions of hydrochloric acid, sulfuric acid and nitric acid with metals, bases and metal carbonates to form salts. Specification Point 2.38 - Know that metal oxides, metal hydroxides and ammonia can act as bases, and that alkalis are bases that are soluble in water. Specification Point 2.39 - Describe an experiment to prepare a pure, dry sample of a soluble salt, starting from an insoluble reactant. Specification Point 2.42 - Practical: prepare a sample of pure, dry hydrated copper (II) sulphate crystals starting from copper (II) oxide. Complete set of Chapter 5 Worksheets are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 1.34C - Understand how to carry out calculations involving amount of substance, volume and concentration of solution. Specification Point 1.35C - Understand how to carry out calculations involving gas volumes and the molar volume of a gas. Complete set of Chapter 2 Lessons are available.

Complete set of companion PDF worksheets for Edexcel IGCSE Chemistry (4CH1) Chapter 2 - Atoms and Molecules. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Five worksheets included: 7 - Atoms and Molecules 8 - The Periodic Table 9 - Formulae and Calculations 10 - Formulae and Calculations Part 2 11 - Concentrations and Volumes

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 14 - Metallic Bonding. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 1.52C - Know how to represent a metallic lattice by a 2-D diagram. Specification Point 1.53C - Understand metallic bonding in terms of electrostatic attractions. Specification Point 1.54C - Explain typical physical properties of metals, including electrical conductivity and malleability. Complete set of Chapter 3 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 2 - Solutions and Solubility. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 1.4 - Understand how the results of experiments involving the dilution of coloured solutions and diffusion of gases can be explained. Specification Point 1.5 - Know what is meant by the terms: solvent, solute, solution and saturated solution. Complete set of Chapter 1 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Chemistry Lecture 5 - Methods of Separation. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 1.10 Describe the following experimental techniques for the separation of mixtures: Simple distillation. Fractional distillation. Filtration. Crystallisation. Paper chromatography. Complete set of Chapter 1 Worksheets are available.