Flashcards you can print out

http://www.spanishdict.com/flashcards/64234/ser-present
http://www.spanishdict.com/flashcards/64235/ser-preterite
http://www.spanishdict.com/flashcards/64238/ser-imperfect
http://www.spanishdict.com/flashcards/64240/estar-present
http://www.spanishdict.com/flashcards/64241/estar-preterite
http://www.spanishdict.com/flashcards/64243/estar-imperfect