I have been meaning to share this link for a while. Clicking on it will take you to a page of resources produced through the Nova Scotia Department of Education. It is a series of videos of classrooms in which early primary teachers (grades 1, 2 and 3) work on important mental math strategies with their students. Each video is about 8-10 minutes and well worth a viewing. They look to be producing videos for grades 4 and up as well, although the page has remained unchanged for the better part of a year, I am afraid.
The Ministry of Ed in Nova Scotia has likewise produces a series of viewing guides, which I have “prettied up” and have attached for your use. Each viewing guide is matched to each of the videos indicated above. Perhaps your school staff or primary team could view the videos and have a collaborative chat about the strategies used…? It’s ALWAYS best to learn these things together!