I grew up in a small village in suffolk. I visted my parents this weekend who still live there.
I was reminded of all the lessons I had , had there ( on the cornet- a smaller. version of the trumpet) , and how very little of it stuck . It often seemed to me that we just learnt how to get through the current tune , I struggled to quantise and genralise the infomation . If I want to learn somthing I have to focus in on it .
for example the circle of fifths . which is in one way a way to underarand the relashonships between minor and major scales ,
I learnt fron Tony Douglas at the firat big band I was in to learn my scales by ear. This means rather then having it writtern down in front of me I listen for right and wrong notes,
I can now play all of them
Looking through the books I had as a kid ,it seems I did learn 5 or so scales but I was given no context .
not wishing to be too technical but major scales have 8 notes they are tones apart except 3-4 and 7-8 which are semitones apart.
If you look at a piano or keyboard you will see that E and F and B and C don't have black keys joining them yo the keys to their right, this is beacuse they are semitones apart which is the smallest division on a piano avaliable.
knowing this , having the visual referance and being able to hear the differnce between a semitone and a tone made all the differnce
fron being able to learn a few in 8 years to learn about 40 in 18 months
Beacuse I underatand how they are built if I were to forget I could juaf rabuild my knowledge .
Not everyone will learn like I do ,
but I think it's important to know how you learn and not to give up hope as I did if you need a differnt stratagy