Crucigrama de clases/hora

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Across
  1. 1. elective
  2. 3. Thursday
  3. 5. one (as it relates to time)
  4. 6. always
  5. 12. never
  6. 13. physical
  7. 15. science
  8. 18. Tuesday
  9. 19. education
  10. 20. Wednesday
Down
  1. 2. Friday
  2. 4. times
  3. 7. math
  4. 8. period
  5. 9. afternoon
  6. 10. Monday
  7. 11. time
  8. 14. four
  9. 15. classes
  10. 16. half past
  11. 17. quarter