Studies of 318 Chicago area school found a positive association between school yard greenness and improved performance on math tests, and less powerful association with performance on reading. Researchers dug deeper to determine whether the impact was related to all greenness, grass or trees. Only the presence of trees was associated with higher performance.
Might School Performance Grow on Trees? Examining the Link Between “Greenness” and Academic Achievement in Urban, High-Poverty Schools
Frontiers in Psychology
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