It sounds like when you say "theory" what you mean is sight-reading. I'm not aware of any tools but there must be lots of options online. I learned from books a

It sounds like when you say "theory" what you mean is sight-reading. I'm not aware of any tools but there must be lots of options online. I learned from books and it's just a matter of practice. There are lot of music theory books that I can recommend, but it sounds like your class has you covered. Sight reading is like learning to read a spoken language. You just need to do it every single day and it will come with time. If anyone else is interested in books that I would recommend for theory: - Elementary Rudiments of Music by Barbara Wharram (a good intro book) - The Jazz Theory Book by Mark Levine (this is my "theory bible" and, despite the title, is not limited at all to only jazz music)