CodeHS has extensive review materials for both AP Computer Science A and AP CS Principles to help students prepare for both AP exams.
AP CSP Materials
You can find our AP CS Principles exam review materials at the end of the AP CSP course in the "AP Exam Review" module.
Additional practice for the Performance Task can be found in Supplemental Materials.
The review is also available in a Playlist at AP CSP Review. From that page you can subscribe your sections to the playlist, or you can send that link directly to your students.
AP CSA Materials
The AP Computer Science A exam review course can be accessed at here. If you aren't enrolled in the AP Computer Science A review course (you'll know if you get a "Page Not Found" error when accessing the previous link), visit here to enroll yourself and be able to set that as the Main Course for your sections.
In addition to the full AP Computer Science A Review course, the AP Computer Science A course has a practice exam unit available within Supplemental Materials. View the Preparing Students for the AP Computer Science A Exam Webinar to learn more.