I've been creating stuff for CAIE iGCSE Biology, I'll upload my powerpoints after I've finished the first batch of files relating to the exam questions organised by topic. 

For Paper 4 and Paper 6 broken down by topics in a single file (have identical content, but the 2 Pages per sheet version is more manageable) for printing:

As 1 page per sheet (Paper 4 and 6 combined: 832 Pages)

As 2 pages per sheet (Paper 4 and 6 combined 413 Pages)

I print out the 2 pages per sheet version using a printing company for my students. 

I'm working on a Paper 2 version that would cover 2021 to 2016, which should be done before the end of March 2022.

Happy Revising!