Consider this claim: Skipping a grade benefits students who are excelling in school. Which is the strongest...

Consider this claim:
Skipping a grade benefits students who are excelling in school.
Which is the strongest evidence to support the claim?
A professor of gifted education asserts that studies on the impact of grade skipping have demonstrated positive academic outcomes, including higher grade point average and school satisfaction.
In recent years, a number of education specialists have argued for what is called "single-subject acceleration": moving a student who shows a strong aptitude for a certain subject into a higher grade level for that specific subject.
Dr. Martin Luther King, Jr., and Supreme Court Justice Sandra Day O'Connor both skipped two grades.