Need help Helping

[Pheonix1337]

Im currently helping a Japanese exchange student learn English. Her English is actually really good, however shes having trouble with grammar ex. difference between who, whom, whose, and "that", etc. Does anyone know where I can get books, or whatever, to help her? I looked through some books at a local Japanese gift store, but they are aimed more for people who know 0 English. Any advice would be great.