PISA exam math scores

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Across
  1. 2. - negative word
  2. 4. - there was a drop in math score because of this
  3. 5. - approximate number of the total scores
  4. 6. - one of the subject that uses calculator
  5. 8. - numbers we get after we take test
Down
  1. 1. - when the PISA test results came out
  2. 3. - the test name
  3. 7. - students who goes to highschool
  4. 9. - what is PISA