School year	Group	N	Mean	S.D	t-statistic	df	Sig.
2018-2019	Participants	76	17.08	0.21	3.855	123	0.00
2018-2019	Non-Participants	49	15.98	0.35	3.855	123	0.00
2019-2020	Participants	76	16.94	0.19	3.150	123	0.00
2019-2020	Non-Participants	49	15.39	0.39	3.150	123	0.00