with my students i make them take home any marked assessments to show their parents-they need a parental signature on them which they bring back to show me their parents have seen their work, and i record this in my markbook.

I would make sure she is using her diary to record homework, and check that she is doing it. Every subject should give her an assessment schedule -it is worth having a large desk planner and writing all the due dates straight on it so you can clearly see when major things fall due.

Email is the best way to catch most of us since we are usually in the classroom-some subjects may have homework books depending on the school eg maths, science.