I guess test scores are more efficient because GPAs are somewhat subjective and can be gamed to a degree. By both the school and the student. Two schools with

I guess test scores are more efficient because GPAs are somewhat subjective and can be gamed to a degree. By both the school and the student. Two schools with two different grading tolerances can produce students with similar GPAs but different SAT/ACT scores. As the SAT/ACT is a national standard, not a regional one.