Edssential article from @HFletcherWood :
I received too much advice at my Teach First Summer Institute: much of it appeared contradictory, all of it was rooted in the giver’s context. For some years therefore, I forswore offering unsolicited advice. At Teach Like a Champion training in May however, I felt including teaching tips worked very well. So this summer, as a tutor at Teach for Sweden’s Summer Institute, I renounced my previous policy and inserted brief advice within sessions. To my surprise, in evaluations trainees repeatedly mentioned such tips favourably.