I try and write everything up on the computer because it is easy to change and my handwriting isn't so good. Sometimes you just need a book to lay things out properly. Some of these relate directly to Unit work some of them are just skills. I will try and write up a few examples, or some notes on a few different topics
3 steps how to do short multiplication, annotated.
Division by Cancellation / Simplifying
How to avoid the Bus Stop method if you can.