Redo AS Levels

I have been absent from sixth form for a few weeks due to suffering from Glandular Fever. My teachers have said that I may have to redo my AS levels due to missing so much. I am wondering if anyone is doing the same study areas as I would be able to help with revision techniques or tips so I can avoid redoing my AS Levels. I am studying:
• AQA Sociology (family and education)
• AQA Psychology
Please help ������