Multiplication of Two-digit Numbers. Animated powerpoint covering the ‘area method’, the ‘let’s try in our head’ method, + the multiples of 5 short-cut. 3 slides.

IGCSE Optical Fibres. Animated powerpoint covering the benefits of fibre optics over copper wire, basic construction and network infrastructure. 11 slides.

Introduction to the Cosmic Background Radiation (‘CBR’) that goes with the Big Bang. Briefly summarising the Big Bang and the search for & confirmation of CBR. 2 sides.

Electrostatics, voltage and current, dangers and protection for devices and humans, measuring voltage, current, power and energy, series and parallel circuit resistance, introducing variable resistors, NTC thermistors, LDRs, diodes, capacitors, relays, transformers, rectifiers and inverters.