A.H.
I taught elementary, but what I did to organize each subject is I used a lot of file folders. For example, for language arts we had a story each week with certain key skills that were taught for spelling, grammar, writing prompts, vocabulary, tests, transparencies, etc. I just pulled all of my materials and resources and put them in an individual file folder. As I collected activities for each story or skill I would keep them in this folder. It made it very easy year after year to go directly to my resources/notes and build from there. I kept it all in my file cabinet with each drawer labeled for each subject.
I hope this answers your question. It was a really very simple method to keep track of things.
HTH,
A.