> We have been using your site for a few years and have always been able
> to use it through try it now. In class today, this wouldn't work, as it said we
> had exceeded the limit of try it now.
Sorry that the "Try it now" was full - it is set up to allow for 5200 concurrent users. After that, to avoid not having enough API keys available for anyone in the "Try it now" group, you see the message that you describe, suggesting creating your own account. When I first set up the "Try it now" setup, the idea that I'd have 5200 anonymous students actively using the site at once (in addition to logged on users) seemed like a huge number, but I've noticed that recently I'm hitting that limit a few times a week now.
> We then tried to create accounts for the pupils, but we are limited to 31 per
> teacher. Some of our teachers have 4 classes, i.e., 80 pupils. How can we
> resolve this?
Email me and I can increase the limit. I've done that for your account now.
Kind regards
D