Muisc theory is essential to analyzing, criticizing and understanding flows and patterns in the musical world. There are lots and lots of concepts and constructs in music and these will be learnt on a step by step basic. hence the categorization of music thoery into grades is to enable you to gradually understand music from the simplest concept to the complex ones.
I will try as much as possible to make each topic simple, brief. And straightforwad. As you read through the lectures. You can ask questions on the comment sections and you will be sure to get a reply.
No time to waste. Let's begin