I wanted to add a short reading list with journal articles that I have found helpful. This is just a wee fraction of what is out there but it might be helpful!
I have left out books, but will get around to adding them in the future.
Anon (2018) Forestry Commission Research Note 103 Outdoor learning: closing the attainment gap in primary schoolchildren in Scotland, February 2018.
Bartosh, O., 2003. Environmental education: Improving student achievement (Doctoral dissertation, Evergreen State College). Vancouver
Berman, M.G., Jonides, J. and Kaplan, S., 2008. The cognitive benefits of interacting with nature. Psychological science, 19(12), pp.1207-1212.
Berezowitz, C.K., Bontrager Yoder, A.B. and Schoeller, D.A., 2015. School gardens enhance academic performance and dietary outcomes in children. Journal of School Health, 85(8), pp.508-518.
Christie, E. & Higgins, P. (2012) The impact of outdoor learning experiences on attainment and behaviour:A brief review of literature. University of Edinburgh.
Harvey, M., Rankine, K. and Jensen, R., 2017. Outdoor learning hubs. A Scottish attainment challenge innovation fund project report.
Ingulli, K. and Lindbloom, G., 2013. Connection to nature and psychological resilience. Ecopsychology, 5(1), pp.52-55.
Kuo, M., Barnes, M. and Jordan, C., 2019. Do experiences with nature promote learning? Converging evidence of a cause-and-effect relationship. Frontiers in psychology, 10, p.305.
Lieberman, G.A. and Hoody, L.L., 1998. Closing the Achievement Gap: Using the Environment as an Integrating Context for Learning. Results of a Nationwide Study.
Meighan, H.L. and Rubenstein, E.D., 2018. Outdoor learning into schools: A synthesis of Literature. Career and Technical Education Research, 43(2), pp.161-177.
Williams, D.R. and Dixon, P.S., 2013. Impact of garden-based learning on academic outcomes in schools: Synthesis of research between 1990 and 2010. Review of educational research, 83(2), pp.211-235.
Williams, F., 2017. The nature fix: Why nature makes us happier, healthier, and more creative. WW Norton & Company.
You may also be interested in the Outdoor Learning and Play Research Group