Back-to-School Crossword

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Across
  1. 3. You use it to note text that you like
  2. 6. A main ingredient in Studentsbane
  3. 7. A very active part of school
  4. 8. A good time to consult teachers privately
  5. 11. A purveyor of knowledge
  6. 12. One's mental dictionary
  7. 15. These are no longer allowed in classrooms
  8. 17. You sit at it
  9. 18. Younger students have to learn this
  10. 20. The gaining of which is the point of school
Down
  1. 1. One of school's oldest subjects
  2. 2. Slow computer
  3. 4. Very sticky
  4. 5. Its practitioners are stereotypically insane
  5. 9. Study deck
  6. 10. A school essential
  7. 13. Studentsbane
  8. 14. Fuels pens
  9. 16. Teachers give students many of these
  10. 19. You write in these