Why don't you have any science lessons for middle school grades?

The science seems to be high school science. However, some of it is learned in middle school, so I guess you're just going to have to filter out what you want your students to do. I like your idea though! Perhaps there could be a section with the middle school science, but the videos are the same as the high school section.

science for year 7 and 8 is hardly there. how can we have more resources on this