Is it just GNAV you are having issues with? This subject has always been a pain in the neck for many and maybe you will get better progress with other subjects. It might also be the case you are better suited to a residential course despite the increased costs.
I never had problems in studying the ATPL subjects but I remember GNAV was the subject I was the most scared of and I supplemented my studies with Cat3C videos on YouTube and their iBooks. The explanations are brilliant and made the subject crystal clear to me: as long as you remember you have 180 degrees in a triangle and 360 in a circle and learn how to make a quick sketch of the task you can easily do it. If I did it with a 93% mark, so can you. And I have always been terrible at maths and never studied trigonometry at school (this is a big one!).
Last edited by Banana Joe; 26th Apr 2018 at 10:40.