B5 - Homeostasis and Response
B6 - Inheritance, Variation and Evolution
B7 - Ecology
C6 - The rate and extent of chemical change
C7 - Organic Chemistry
C8 - Chemical Analysis
C9 - Chemistry of the atmosphere
C10 - Using Resources
P5 - Forces
P6 - Waves
P7 - Magnetism and Electromagnetism
Take any key word or topic from the syllabus and type into YouTube, "free science lessons - followed by the key term"