Unfortunately, we haven't implemented an exporting feature yet.
However, we do recognise the desire to have this on the teacher platform, especially for administrative purposes. Although we can't give a date, it is likely to this will be added in the future.
Until then, the easiest way to extract the data is by selecting all the student data and using CTRL+C or CMD+C to copy it into your sheet. We understand that this is not ideal, and would need some further data cleaning.
We're sorry that this is not the perfect answer and will try our hardest to get the functionality added.