20 words 20 clues

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Across
  1. 3. store paper
  2. 6. physical improvements
  3. 7. living orgasms
  4. 8. most used in school
  5. 9. on protection nowadays
  6. 10. folder mini file saver
  7. 12. Most non real world subject
  8. 13. cards flash notes
  9. 14. measure anything
  10. 15. look brighter
  11. 17. clearsomething
  12. 18. written on
Down
  1. 1. add sum or divide
  2. 2. experiments
  3. 4. language
  4. 5. ball/field
  5. 7. ball/goal court
  6. 8. sharper utensil
  7. 11. feet ball field
  8. 16. Put things in