Historical clue formulations

• Service provided by Kaplan and the Princeton Review — 2024-05-08
• Course for many a high schooler, in brief — 2020-10-31
• Extracurricular study for many a high school jr. — 2015-10-21
• Kaplan course for H.S. students — 2015-10-04
• Kaplan course, briefly — 2007-03-15