Table 2.

Number of studies by outcome type and age.

	Infants	Primary	Secondary
Self-concept and intrapersonal skills	2	8	40
Social and interpersonal skills	1	11	30
Mental/ emotional health and wellbeing	3	9	15
Environmental knowledge/attitude	1	22	13
Engagement with learning (motivation)		10	12
Academic Progress	1	8	8
General Learning Skills		3	2
School attendance rate	1		2
Other		4	2

Studies which had multiple outcomes and ages were counted for each category.