This is absolutely correct. I learnt this fast with 1st/2nd grade homework - I do more harm than good by actively participating. Sure I know what 32-29=3 but I

This is absolutely correct. I learnt this fast with 1st/2nd grade homework - I do more harm than good by actively participating. Sure I know what 32-29=3 but I do not know how that is being taught in the classroom and if I start sticking my oar in it goes sideways quickly. It's far more constructive to be supportive in exactly the way you mention.