Teachers at School A were given a substance abuse knowledge test. During the next four months, the teachers attended training sessions in substance abuse. They were then given the knowledge test again. Teachers at School B were given the substance abuse knowledge test, and four months later, they were given the test again. What kind of design was used?
Teachers at School A were given a substance abuse knowledge test. During the next four months, the teachers attended training sessions in substance abuse. They were then given the knowledge test again. Teachers at School B were given the substance abuse knowledge test, and four months later, they were given the test again. What kind of design was used?
Ans: B
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