I just sent this to my choir friends.
I just came across this website that seem to explain well the theory of music.
I decided to explore the 'ABRSM Music Theory' route.
I think at the end of each lesson of each grade...
you can actually take the 'ABRSM Music Theory' EXAM.
Up to Grade 5 it is very easy... children are already doing it... but for adults...
it's a bit harder... because... they don't listen to their parents anymore...
about what to study... that is.
If you need help with the lessons, you can always ask those of us who've been through this.
The lessons seem to be very close to the way our Choir Mistress has been teaching... only difference is...
you could have the lesson repeated... over and over again... try getting Choir Mistress to do that.
Main Website ~ Music Theory Videos
~ABRSM Music Theory
Here's the direct link to the FIRST lesson
Music Theory: Note Names, Rests & Dotted Notes