What subject is this?

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Across
  1. 1. pupils learn poem in this subject.
  2. 5. pupils learn about the past in this subject.
  3. 7. education the boys play football during _____________________ class.
Down
  1. 2. pupils do some experiment in this subject.
  2. 3. this subject offers painting and drawing.
  3. 4. multiply is part of the subject ___________.
  4. 6. singing is part of the subject _______.