Let individual teachers continue to use it.
If teachers cant test this for a while, how are they going to convince the rest of the school of how useful it is. I would be devastated to now lose 1 years worth of data and all my seating plans. I really want to convince the senior management team of how great it is!
S. Collins commented
Yes! I am so sad about what Classcharts is doing. I don't want to lose all my data - I want it available here instead of screenshotting/exporting an Excel file. Why not charge a yearly fee for individual teachers or something?!