Thanks for those who have passed on feedback to me. I have amended any lesson with typos or mistakes.
We have found two glitches with the site to date: the class list csv uploads, which is being fixed; and I have found a problem with the GDC video tutorials within the lessons. This will take longer to fix, but I am confident that this will be completed by the end of October at the latest.

Keep using the site, and keep your comments coming, as it is the only way to improve the service for you and your students.