I need help figuring out the best way to create a study guide for my boyfriend!!!

My boyfriend is being tested in a few months for some various plumbing certificates and he has a little book of about 98 pages or so to look over. I want to help him and create a study guide or something to make it easier for him to look over on the go at work during the day. Is there a website that could help me with that ? Or what’s the best way to go about this