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Table 1.
Student grades and teacher evaluations at the end of the semester for classes that did or did not have the “Gold, Silver, and Bronze Petri Dish Awards in Microbiology.”
Students Mean gradea SD 
Did not have the award system 34 7.22 0.7198 0.001241* 
Had the award system 34 7.84 0.8008  
Teachers N Mean gradea SD P 
Did not use the award system 82.3 11.00203 0.270 
Used the award system 90.8 3.37569  
Students Mean gradea SD 
Did not have the award system 34 7.22 0.7198 0.001241* 
Had the award system 34 7.84 0.8008  
Teachers N Mean gradea SD P 
Did not use the award system 82.3 11.00203 0.270 
Used the award system 90.8 3.37569  

aScale of 1–10 for student performance, with 10 being the highest grade; scale of 10–100% for teacher performance, with 100% being the highest score (Student's t-test, *P < 0.05).

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