Free Sheet Music, Music Lesson Plans, Music Composer Biographies, Music Theory Worksheets and More | Creative Resources for Elementary Music Education. Making Music Fun! has been really useful, especially for the younger students - upper PYP and younger MYP. I don't think I'll be using it for DP...

"AllMusic is an online music guide service website and provides comprehensive music info including reviews and biographies. Get recommendations for new music to listen to, stream or own." It's just a great resource site for exploring music releases.

Chord finder, including split chords and chord variations. Also features standard and exotic guitar scales for lefthanded guitar. Interactive site for guitar students. Scales and modes with TAB and fretboard charts and chord charts.