I've worked at 2 edtech startups and have a few teachers in my family, and my personal observation has been that technology is best when it removes friction in the areas of classroom control, assessment, communicating with parents, and organizing presentation materials. For the part where teachers figure out how to engage students and get them over conceptual humps, it seems like teachers are way ahead of any technology.

The canonical technology fail in edtech is to dump computers or robot kits into the classroom with no training. I have been in a number of classrooms where stuff like that winds up piled in a very expensive corner.

Also useful and sort of technological: https://donorschoose.com