Syrmpas Ι., Goudas Μ., Digelidis Ν. and Papaioannou Α. 2020. “After School Exercise”: A Program to Promote Students Physical Activity ΙΙI. Students’ Knowledge Development (Short version of a Greek article). Inquiries in Physical Education and Sport. 18, 2 (Jul. 2020), 116–123. DOI:https://doi.org/10.26253/heal.uth.ojs.ispe.2020.1546.