Glastry crossword!!!

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Across
  1. 2. THE COLOUR OF THE WALLS IN THE HALLWAY
  2. 3. THE SUBJECT WHERE YOU HAVE TO USE A CALCULATOR
  3. 6. THE THING YOU GET IF YOU ARE VERY NAUGHTY
  4. 8. THE SURENAME OF THE EHAD TEACHER
  5. 10. HOW TEACHERS REWARD YOU IF THEY YOU ARE VERY GOOD
  6. 12. THE NAME OF THIS TYPE OF PUZZLE
Down
  1. 1. THE AGE YOU CAN LEAVE SCHOOL AT
  2. 4. WHAT YOU USER TO HEAT THINGS UP IN SCIENCE
  3. 5. HOW OLD MOSTPEOPLE ARE WHEN THEY START SCHOOL
  4. 7. THE PEOPLE THAT HELP YOU LEARN
  5. 9. THE INSTRAMENT THAT DR TIMPANI PLAYS IN THE CATHERDERAL
  6. 11. THE SURNAME OF YOUR HEAD OF YEAR