	1^st year		2^nd year		3^rd year		improvement
	spring	fall	spring	fall	spring	fall	improvement
change in the Interest	comprehensive academic achievement
fall of 1^st year to spring of 2^nd year	0.001	0.004	0.027	0.032	0.064	0.062	−0.059
spring of 2^nd year to fall of 2^nd year	0.017	−0.028	0.011	0.069	0.069	0.052	−0.024
fall of 2^nd year to spring of 3^rd year	−0.03	0.003	0.012	0.013	0.011	0.015	−0.058
spring of 3^rd year to fall of 3^rd year	0.101	0.091	0.05	0.041	0.084	0.139**	0.007
change in the Interest	calculation problem
fall of 1^st year to spring of 2^nd year	0.046	0.025	0.006		0.034	0.062
spring of 2^nd year to fall of 2^nd year	−0.018	−0.038	0.005		0.093	0.056
fall of 2^nd year to spring of 3^rd year	−0.015	0.002	0.003		−0.017	0
spring of 3^rd year to fall of 3^rd year	0.054	0.025	0.061		0.139**	0.102
change in the Interest	basic problem
fall of 1^st year to spring of 2^nd year	0.048	0.09	0.084	0.018	0.044	0.029
spring of 2^nd year to fall of 2^nd year	0.025	−0.088	−0.045	0.118*	0.036	0.069
fall of 2^nd year to spring of 3^rd year	−0.018	0.058	0.074	−0.002	0.045	0.022
spring of 3^rd year to fall of 3^rd year	0.088	0.021	0.008	0.093	0.053	0.172**