As in for exams in vet school? At Liverpool we don’t have past papers etc but VIN is a good website, you can find loads of flash cards on Quizlet etc. Personally I made summary tables for each topic and now I use that to revise from, and use YouTube for any difficult concepts and draw things quite a lot - I like some textbooks like Dissection of the Dog with pictures. Talking to friends about topics even casually is quite useful to solidify knowledge.