Here are two references that I created. Feel free to use them for yourself or your students. These will eventually be part of a larger handbook.
Level 1 Guide
The first download here is four page guide used with the Level 1 materials. It includes vocabulary for intervals and rhythms, interval symbol meanings, the eight level 1 Intonations, explanations of basic rhythmic symbols, and information about the Diatonic Scale. It is used as a reference for students if they are playing a game and can't remember something.
1) Byzantine Notation Symbols- Names Intervals Rhythms- symbols that lengthen and shorten (only gorgon right now) Qualitative 2) Types of Scales 3) Mode Keys 4) Time Keys 5) Types of Melodies and their Cadences (not complete) - Eirmologika, Sticherarika, Papadika