Kickoff, Classrooms and Cooler Weather

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Across
  1. 3. Not for public eyes
  2. 7. September holiday that marks the unofficial end of summer
  3. 8. Early version of a product or system
  4. 11. Oops - Dropped the ball!
  5. 12. Fuel for morning standups
  6. 13. Essential gear for the first day of school
Down
  1. 1. Month when summer begins to wind down
  2. 2. Six-point score
  3. 4. What turns data into unreadable code
  4. 5. Surprise test
  5. 6. Where fans sit at high school games
  6. 9. Bonus football
  7. 10. Practice of quieting the mind