Generally, the student as an author of a work will own copyright in works they make while enrolled in a school or TAFE.
It is also unlikely that the provisions relating to Crown copyright would apply to works created by students in government schools.
Some TAFEs require as a condition or term of enrolment that all copyright in works created by their students while enrolled in the institution will vest in the institution.
This is a form of assignment of copyright and must therefore be in writing and signed by the student to be effective. The signing of the enrolment form by the student will most likely meet these requirements.