Of the professors stalked, 40% said they subsequently gave the student a higher grade than they deserved.

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They indicate the minimum score on each of the four subject tests for a student who has a 75% chance of earning a grade of C or higher or a 50% chance of earning a B or higher in a typical first-year college course.

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Harvard and Columbia researchers found a good fourth-grade teacher makes a student 1.25% more likely to go to college and earn a higher salary.

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