Back to school

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Across
  1. 3. Often checked in Sapphire, featuring the Alphabet.
  2. 4. Assignments completed outside of school.
  3. 5. Signals classes to change
  4. 7. Colored, Mechanical, Wooden
Down
  1. 1. Fixes mistakes done in pencil
  2. 2. Lunch room, now featuring a wall
  3. 4. Coffee station, Ironmen ____
  4. 6. Metal, purple, and rarely used