Yes, we have past papers for:
IG: Primary 5+6 grade, Secondary 7+8, O level 9+10, and
A level 11+12 (Edexcel and Cambridge).
AP (free response question).
IB (standard level 9+10, higher-level 11+12).
Test books: 400 hundred (multiple-choice) questions with answers and explanations, available for SAT, AP, and ACT.