So im am 18 hours into PPL and am really struggiling wioth the airlaw.
Read the book 3 or 4 times been watching CBT vids to on and off now going through book making notes to but still cant seem to get more then 55% - 60% on the airquiz practice test.
Unfortunately questionbanks are a necessity for these exams, both for the PPL and the ATPL exams as I'm now finding. They go against the spirit of learning, and regrettably the nature of multi-choice exams is that it's entirely possible to get 90% + in exams without knowning anything about the subject at all. Conversely the questions asked are often very esoteric and even quite a good knowledge of the subject is insufficient to answer the questions asked.
As someone else has said you need to strike a balance between identifying the bits of the subjects you need to learn and understand to stay alive. For example knowing when carb ice is likely to form, and knowing which way to turn if you are approaching an aircraft head-on. Beyond that, its a case of rote-learning answers sadly.
The best strategy I find is reading through the material covering an area, making notes and listing key points, and then hammering practise questions on the same material.