Over the course of the past few years, in order to help others with learning ASM, I've continuously worked on and released my SNES ASM tutorial. Nowadays, I have two ASM tutorials, one focused on opcodes and one which gets you started with ASM hacking. Feel free to check them out!
If you want to edit my submissions, you have my permission. In fact, you can even submit them back to the Central. It'll simply mean more (improved) resources for the hackers out there which is a good thing.