I took algebra and geometry in the early 70s; I'm taking the GRE on 7-19. I can't recall it. what do I do?

Question

I can't even understand the strategies in my Barron's prep book. How can I practice if I don't remember the concepts?

Answer 1

Go to the library and get a text book with explanations.   If you have a really good library, get what's called a "TAE" - Teacher's Annotated Edition - it's the one with the answers, and ideas of how to explain the material.  

Once you thumb through the book, much will come back to you.

Answer 2

Look around online for specific concepts you don't understand. When you search, add something like "simply explained"

Best of luck!