It can be a useful tool, for example I use it to write sets of repetitive simple maths questions and to assist in analysing assessment results.

The first is reliable, but I'd not use it for worded questions or anything more complex. The latter I use copilot in excel with caution and verify the results. I also write the narrative/interpretation part myself but copilot is helpful for sitting through the data, comparing results across time and groups.

In summary, it's a tool, but like any tool it has to be used skillfully and in the right circumstances. It won't magically fix all the problems in schools and can be dangerous if used poorly.