non-school           
adjective [ before noun ] (also nonschool) uk/ˌnɒnˈskuːl/ us/ˌnɑːnˈskuːl/
 校外的,与学校无关的
not belonging or connected to a school
  Many of the kids go to non-school clubs. 这些孩子中有不少都参加了校外的俱乐部。 
 There are lots of non-school activities that children can get involved in.
  (时间)课外的
referring to the time when children do not go to school
  She is only available during non-school hours. 她只有不上课的时候才有时间。 
 You are allowed to work for up to seven hours on a non-school day.
 - More examples
 - I got in trouble for wearing non-school shoes.
 - The ban had a major effect on the Scouts, Guides, and other nonschool groups.
 - They should be doing lots of outdoor activities during non-school hours.