A problem at School

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Across
  1. 3. Miss Steel makes the ghost leaves by __ him finish his work
  2. 6. What is the boy using to write on the slate?
  3. 8. Miss Steel refuses to take a __ from the headmaster before entering the school
Down
  1. 1. What color is the calculator Miss Steel gives the boy
  2. 2. The ghost is haunting the school because his __ said he couldn't leave
  3. 4. The ghost was a ___ at the school a long time ago
  4. 5. Miss Steel's job is __ (the answer is a compound word with a hyphen)
  5. 7. The headmaster is scared because he knows there's a __ inside the school