Related Clues:

• Obsolete VCR's
• See 28 Across
• Trial balloons
• They're not final releases
• Tryouts
• Critical evaluations
• Grade determiners
• Finals, for example
• Lab activity
• What the website Tickle is full of
• They often make the grade
• LSAT and GMAT, e.g.
• Some test versions
• Battery parts
• Criteria