There was an article in a Telugu Daily Eenadu today on page 13 on improving memory.
It talks of three stages
It emphasizes association.
Associate new information with some old information.
I am emphasizing revision of X class materials till 30th April. Then from May 1 when you read XI material you can associate with known things in X class material. You will have better memory then. Don't create a situation where you learning anything without a continuity. Create a continuity by remembering old chapters. That will make learning new chapters more easy.
I shall write some more pointed covered in this article