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*Experimental group by class level significantly improved from pre-test to post-test compared to control group (p = 0.0001)

$Freshmen pre-test scores lower than seniorsí (p = 0.059)

**Sophomore pre-test scores significantly lower than juniorsí & seniorsí (p = 0.05; p = 0.022)

+Improvements were not significant among groups at post-test (p = 0.317)