My son was in a private preschool and scored in the 99 percentile nationally. The test given by a private school teacher.

My friend was Valedictorian at a nationally high achieving public school. Grades subjective.

I was a high scoring test-taker (99 percentile) in national tests throughout an average school. Test given by state teachers.

Note the differences of subjective and objective.

Test taking and Medical models use deductions: what can't possibly be the answer.

Answer the easy questions first, so you get 20 correct and 1 wrong rather than vice versa: 1 right and 20 wrong.