Companion PDF worksheet for Edexcel IGCSE Biology Lecture 52 - Feeding Relationships. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 4.6 - Understand the names given to different trophic levels, including producers, primary, secondary and tertiary consumers and decomposers. Specification Point 4.7 - Understand the concepts of food chains, food webs, pyramids of number, pyramids of biomass and pyramids of energy transfer. Specification Point 4.8 - Understand the transfer of substances and energy along a food chain. Specification Point 4.9 - Understand why only about 10% of energy is transferred from one trophic level to the next. Complete set of Chapter 6 Worksheets are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 53 - The Carbon Cycle. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 4.10 - Describe the stages in the carbon cycle, including respiration, photosynthesis, decomposition and combustion. Complete set of Chapter 6 Worksheets are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.3.1.8 - Antibiotics and painkillers. Specification Point 4.3.1.9 - Discovery and development of drugs. Complete set of Chapter 3 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 4.2.3.1 - Plant tissues. Specification Point 4.2.3.2 - Plant organ systems. Complete set of Chapter 2 Lectures are available.

Complete set of concise, modern presentations for AQA GCSE Biology (8461) Chapter 2 - Organisation. Contains colour coded specification points with handmade vector graphics. Eight presentations included: 6 - Organisation 7 - Enzymes 8 - Digestion and Food Tests 9 - The Circulatory System 10 - Blood Vessels 11 - Coronary Heart Disease 12 - Health and Disease 13 - Plant Tissues

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 and associated PDF worksheet covering the following in a modern, concise format: 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 Lessons are available.

Powerpoint lecture and associated PDF worksheet covering the following in a modern, concise format: Specification Point 4.5 - Understand how abiotic and biotic factors affect the population size and distribution of organism. Complete set of Chapter 6 Lessons are available.

Companion PDF worksheet for Edexcel IGCSE Biology Lecture 51 - Biotic and Abiotic Factors. Contains short answer questions, an activity requiring lateral thinking and exam-style questions. Specification Point 4.5 - Understand how abiotic and biotic factors affect the population size and distribution of organism. Complete set of Chapter 6 Worksheets are available.

Complete set of concise, modern presentations for Edexcel IGCSE Chemistry (4CH1) Chapter 1 - Particles and Mixtures. Contains colour coded specification points. Six presentations included: 1 - States of Matter 2 - Solutions and Solubility 3 - Calculating Solubility 4 - Elements, Compounds and Mixtures 5 - Methods of Separation 6 - Paper Chromatography

Complete set of concise, modern presentations for AQA A Level Psychology (7181 and 7182) Chapter 4 - Psychopathology. Contains colour coded specification points. Five presentations included: 16 - Abnormality 17 - Depression, Phobias and OCD 18 - The Behavioural Approach to Phobias 19 - The Cognitive Approach to Depression 20 - The Biological Approach to OCD

Complete set of concise, modern presentations for AQA A Level Psychology (7181 and 7182) Chapter 2 - Memory. Contains colour coded specification points. Four presentations included: 5 - Types of Memory 6 - Memory Models 7 - Forgetting 8 - Eyewitness Testimony

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.1.3 - Attachment. Ainsworth’s ‘Strange Situation’. Types of attachment: secure, insecure-avoidant and insecure-resistant. Cultural variations in attachment, including Van Ijzendoorn. Complete set of Chapter 3 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.1.3 - Attachment. Explanations of attachment: learning theory and Bowlby’s monotropic theory. The concepts of a critical period and an internal working model. Complete set of Chapter 3 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.1.2 - Memory. Explanations for forgetting: proactive and retroactive interference and retrieval failure due to absence of cues. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.1.2 - Memory. The multi-store model of memory: sensory register, short-term memory and long-term memory. Features of each store: coding, capacity and duration. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.1.2 - Memory. The working memory model: central executive, phonological loop, visuo-spatial sketchpad and episodic buffer. Features of the model: coding and capacity. Complete set of Chapter 2 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.1.3 - Attachment. Animal studies of attachment: Lorenz and Harlow. Complete set of Chapter 3 Lectures are available.

Powerpoint lecture covering the following in a modern, concise format: Specification Point 3.1.3 - Attachment. Caregiver-infant interactions in humans: reciprocity and interactional synchrony. Stages of attachment identified by Schaffer. Multiple attachments and the role of the father. Complete set of Chapter 3 Lectures are available.

Complete set of concise, modern presentations for AQA A Level Psychology (7181 and 7182) Chapter 3 - Attachment. Contains colour coded specification points. Seven presentations included: 9 - Attachment 10 - Animal Studies on Attachment 11 - Explanations of Attachment 12 - The Strange Situation 13 - Disruption of Attachment 14 - Institutionalisation 15 - Early Attachment