Crossword clues for H.S. challenge 3 lettersAnswerClueSATH.S. challengeAPBIOChallenging H.S. sci. classAPEXAMCulmination of a challenging H.S. courseAPEXAMChallenging H.S. testAPBIOChallenging H.S. subj. where students learn about the Krebs cycleAPBIOChallenging H.S. science classAPTESTH.S. challenge with 1-to-5 scoringPSATChallenge for H.S. juniorsPSATH.S. junior's challengeAPTESTChallenge for a H.S. honor studentAPTESTSH.S. student's challenges