This page has lots of review for long essays and short answers
Long Essay Overview APUSH USE THIS!
Survival Packet with great long essay practice
Long Essay, DBQ, and short answer writing guides
The following are past AP exam long essays with student examples and the College Board critiques (many are from the old rubric).
Past period 2 AP exam LEQs with student responses and grades
Past period 3 AP exam LEQs with student responses and grades
Past period 4 AP exam LEQs with student responses and grades
Past period 5 AP exam LEQs with student responses and grades
Past period 6 AP exam LEQs with student responses and grades