All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
If it is a habit that such a girl is helped in such activities and the school does not object to this, then it is permissible, Allaah willing, to help her according to the extent that is permitted. However, if it is commonly required from the girl to depend on herself only in doing the activity, then in this case it is not permissible to help her at all.
Allaah Knows best.