James Naismith.

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Across
  1. 4. did something that broke the rules of a game (The First Basketball Game)
  2. 7. making a lot of noise and likely to damage property (A Rowdy Class)
  3. 8. the qualification you receive after studying in university (Early Career)
  4. 10. a person or thing that is the reason for someone doing something (Where was James Naismith Born?)
Down
  1. 1. job (Introduction)
  2. 2. a noisy and violent fight amongst a group of people (The First Basketball Game)
  3. 3. finishing your studies at a university and leaving(Early Career)
  4. 5. you really want to do something and you will not let people stop you (Interesting Facts about James Naismith)
  5. 6. at the end of a long period of time (A Rowdy Class)
  6. 9. not gentle or careful; violent (A Rowdy Class)