an easy crossword

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Across
  1. 3. a measure for time
  2. 4. a part of an organisation
  3. 5. knowledge recieved concerning a particular fact
  4. 8. a human being
  5. 9. someone who goes to school
  6. 10. instructor
Down
  1. 1. a word or symbol used for counting
  2. 2. a group of people
  3. 6. investigation into a subject
  4. 7. a human-like mammal