Who am I

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Across
  1. 5. Runs an academy teaching techniques for arithmetic
  2. 6. Always wanted to be a teacher
  3. 9. Has her surname sounding similar to her profession
  4. 10. Lives in the land of Kangaroos
  5. 11. Unbreakable Plastics
Down
  1. 1. Decided to join forces when in 6th.
  2. 2. Doctor but does not prescribe medicines
  3. 3. Parent to a "budding doctor"
  4. 4. A teacher prophesied his profession
  5. 7. The only guy who succeeded in marrying his classmate
  6. 8. Sports captain who never took part in School Sports