A few years ago, we started setting some home learning activities that didn't require a written outcome (baking, estimating, reciting a poem and so on). As part of this, we asked for a parental comment - to confirm the learning had taken place.
However, many of the responses, from parents, became so useful that we now include this on all home learning activities. There are many 'good' and 'all done', but also positives, negatives and many 'child needs more help withs'. All of which are vital to find out.