When reading over your notes, for example, you should pause quite frequently and ask yourself, honestly, whether you can remember what you have read and, even more important, whether you can apply it to example problems. Looking at worked examples can be very useful but you should always try another similar example to see if you can do it yourself. We don't set exam questions to test your memory of complicated things. We usually provide formula sheets, for example. Don't rely entirely on our handout notes .
Different people learn in different ways.
Some prefer to start with the mathematics while others prefer diagrams, for example. An individual lecturer's style may not always match yours. Look for an alternative explanation that chimes with your way of looking at a topic that seemed difficult in the lecture. Staff will try to offer one if you discuss your individual study problem with them at tutorials, or by seeing them privately in their offices. It is only by looking at how you attempted a problem, where you got stuck, what you found difficult, that we can help you as an individual.