Radioactivity

 Using the @Pascoscientific Wireless Geiger Counter with the sample holder and using different numbers of metal sheets to reduce the count.

Further Maths

 Playing with 3-D Vectors and comparing this to working with CAD. Rotating objects around, measuring distances to see real-life applications of the Maths.

Inside a plug

 Gone are the days when students learnt to wire a plug, but it is still helpful to look inside and look at a home wiring diagram to see that the sockets and lights are all in parallel.

World Population Growth

World Population Growth in Two Graphs. Over my lifetime is nearly a straight line and none of the students were bothered until we looked at the population size over the past 7000 years

 

Computer Storage

 Some computer history shows students the 5 1/4 Floppy disk, The 720K 31/2 floppy Disk, and the 1.44K 3 1/2 floppy disk onto the Single density CD to the DVD and Hard Disk. I also have a 1980s 300Mb Winchester exchangeable platter, giving the students something to consider.

Online Teaching Success

 Online lessons work well for some subjects like maths - but how about science? After 7 years of online teaching, we know online teaching works well with science, but it also depends upon the students' setup, and if they can manage some half-decent, online works really well.

Ore Extraction

Ore extraction is done by adding some crushed calcium carbonate to a wooden spill and dipping it in copper or iron oxide. Heat fiercely, and with some practice, tiny balls of metal are formed.