School supplies/idioms

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Across
  1. 2. an other word
  2. 5. someone who goes to school
  3. 6. That is a thing that you can use To stick on
  4. 7. that is what you need for mathematics
Down
  1. 1. When you learn very hard
  2. 3. that is a thing where you set your pen,scissors,…
  3. 4. where you eat at lunch in school