Crapita is right. When I was a teacher I was forced to use SIMS https://en.wikipedia.org/wiki/School_Information_Management_...
It's possibly the worst software I have ever had the misfortune to interact with. It started as a Microsoft Access database, written by a teacher, was taken on by a council, and then expanded to be the largest MIS in the UK.
It has always been slow, refuses to cache data on the client side which results in data loss if your wifi signal switches off, has the most clumsy UX I've ever seen, and despite being a modern piece of software it makes Curses look like an advanced UI from the next millennium.