There is no information that they compared open source models and considered whether to build their own data servers.
You should at least do some experiments to show that gpt can improve quality in education, right? Although I know that data manipulation is common in scientific research nowadays by picking the data that better serve the wanted assumption, but this time they even skip this step.
Disclaimer: I live in Oslo; I'm an educator; I usually see similar poor decisions in education due to ignorance.