MCB80x is a fantastic free, open, online Neuroscience course from HarvardX led by Professor David Cox – fantastic animations and interactive demos. You can sign up for the courses for free and there are also weekly brain picks on YouTube (for example). From next September AQA A level Psychology includes quite a hefty injection of understanding the functioning of the brain so some of these videos will be invaluable. But they are useful even now for understanding the brain and neuroscience.
This is the introductory video:
Details of the course here.