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Schematic depicting the experimental workflow. Classes were randomly assigned into experimental (E1, E2, and E3) and control (C) groups. Pre-test was carried out as follows: (1) Test of Gross Motor Development (Second Edition) and (2) Test of School Start Skills. PE classes in C and E1 were conducted by a classroom teacher, while in E2 by a physical education teacher, and in E3 by both of them in cooperation. Post-test was carried out in the same order as pre-test.
