I did the hour of code from BJC (https://bjc.edc.org/hourofcode/) with my 5th graders today but for a handful of them, the website kept freezing or the code would disappear. I had them refresh the browser but the missing code never came back. I experienced that intermittently as well and it looks like internet connection may be a factor. Are there specific requirements besides using Chrome?
also, is there a way to widen up the frames to the browser window size? It is hard to see the blocks in the coding area.