The Age have reported it was the first solo flight of the pilot as well. Both trainee's are reported to be from India:
The aviation student from India crashed his Cessna 150 into a garage attached to several single storey units just before 12.40pm, metres from Cheltenham East Primary School in Melbourne's south-east.
The male pilot in the other plane, a Piper Warrior, was also an Indian trainee but was accompanied by another qualified pilot.
Hopefully, once he is able to, the qualified instructor will be able to shed some light on what occurred and end some speculation.