If you’re looking to give your a-level students a little extra out-of-class tuition, the Saylor Academy
“a non-profit initiative working since 2008 to offer free and open online courses to all who want to learn. We offer nearly 100 full-length courses at the college and professional levels, each of which is available right now – at your pace, on your schedule, and free of cost” might be worth checking-out.
Although it’s aimed at American Community College students – and the various credits and certifications available for completing the course will only be meaningful and useful to US students – this doesn’t mean that actually completing the course won’t help UK a-level students.
The overall level is broadly in line with a-level studies, as you’ll see if you have a look at the free Open-Stax course textbook. This will give you a good idea what’s covered in the course whose syllabus covers 5 Units broadly familiar to a-level teachers:
Since not everything covered in them will apply to a-level you’ll need to check each out to point your students in the direction of stuff to cover / stuff you might find useful to cover / stuff that’s not on the a-level Spec.
While the Sociology 101: Introduction to Sociology course doesn’t push any boundaries – a lot of it consists of “reading stuff from the textbook, thinking about it and maybe answering some online comprehension questions” – there are quite a few video tutorials liberally spread throughout the Units that, if nothing else, you might want to consider pointing your students in the direction of if you want them to have a little extra online help / revision.