Possible Clues:

• College Board exam, briefly
• Juniors' hurdle: Abbr
• Its max. score is 240
• Test that doesn't matter for most college applications
• 130-minute H.S. exam
• Its scores are used in selecting Natl. Merit Scholars
• H.S. juniors' hurdle
• H.S. freshmen may take it
• Warmup for college hopefuls, briefly
• Exam for high-school jrs.