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Related Clues:
- Means of determining proficiency
- Sound check
- Word after beta or acid
- Litmus ___
- Lab act
- It's often taken in silence
- Grade determiner, often
- Mike holder's opening, often
- __ paper
- Part of 16 Across
- Classroom exercise
- Set of questions
- A sub may or may not have one planned
- Classroom delivery
- Occasion for a blue book