Set it straight after the lesson. The exercises mark themselves, and you know how they got on before you teach them again.
Start for free Homework is part of the ClassroomGap-fills, matching, multiple choice and dictation get marked the moment your student finishes. You only look at what needs a person: the essays, and the pattern behind the mistakes.
The result goes where you and the parent will both see it, so nobody has to ask whether the homework got done.