Table 5. Comparison of students’ GPA and scholastic achievement in the first and second grades .

Variable		Average	Standard deviation	T-test
				Homoscedastic	T value	Degree of Freedom	P- value
GPA of the first term	Intervention	13.19	2.84	No	2.97	41.83	0.005
	Control	15.13	1.55
GPA of the second term	Intervention	15.61	1.85	Yes	0.40	45	0.055
	Control	15.41	1.55
The difference between the GPA of the two terms	Intervention	2.41	2.64	No	3.94	32.47	<0.001
	Control	0.28	0.82