Who's the Teacher

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Across
  1. 2. BBM: Ping!!
  2. 5. "You know guys before I became a teacher I was an astronaut" #Enough said
  3. 6. "Are you stupid"
  4. 8. "Ultimately"
  5. 10. "Oh dear" #Sigh
Down
  1. 1. Justin Bieber
  2. 3. "Scuzyu" (Excuse you)
  3. 4. "I lost 12 kgs"
  4. 7. "Pick a number"
  5. 9. Female Shakespeare