I agree with the first sentence. I think that as children grow, they develop in a different way, they learn shame and with it they don´t like someone else to see them.
With the second sentence, I agree with having a structure in the class, something that gives the child confidence in what is being done, but at the same time, I think that each group also builds its structure.
And I also agree with the last sentence, there are children whose way of working is more agile and they finish sooner so we should foresee activities that involve reinforcement of the topic.