How to start Revising.
Revising is not first time learning, although for many it is.
So stage one is to read through your course book. Most students don't have any notes, or notes good enough to revise from. Choose a topic and read through the section you have decided to learn.
Now re-read the section. What are the important things?
Write these down as a series of bullet points. This is your notes to revise.
Look at each of these bullet points in turn. For each do this.
Read the bullet point then read the text in the book about this.
Close the book
Read the bullet point and write down everything you can remember ( writing the stuff down helps it go into memory so don't skip this. It doesn't have to be much.
Check what you wrote and compare it with the book
Repeat 4 5 and 6
Go and find someone
Get them to test you.