Back to school!

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Across
  1. 3. An object commonly used for writing that uses graphite
  2. 6. A soft rock used to write on a blackboard
  3. 8. The most widely spoken language in the world
  4. 9. An expression of human creativity
  5. 10. Learning about past events
Down
  1. 1. Someone who helps students learn
  2. 2. The study of living organisms
  3. 4. The study of chemicals
  4. 5. The study of rocks
  5. 7. The study of numbers