Earl MacDonald, professor of jazz at the Univ. of Connecticut, has create this treasure trove of resources for teaching jazz improvisation, jazz theory, and jazz piano. It contains what is essentially a complete curriculum for teaching jazz improvisation that can used with singers as well as instrumentalists.

This sites contains downloadable links that contain very lucid and practical curricular ideas and suggestion for beginning and intermediate guitar classes and ensembles. The language is targeted at two groups: those teachers who are starting guitar programs and those teachers who themselves are not proficient guitarists yet are teaching a guitar class. The "further reading" at the bottom is icing in the cake.

Like many similar resources, this site offers both free and paid-for options. It functions in the could, so there is no need to download anything to a computer, though these is an mobile app available too. The site offers both lessons and exercises. The lessons take students through basic music theory concepts while the exercises practice these concepts. The exercises are completely customizable as can be sent to students as customized.

FLAT is essentially Google's attempt at notation software. Thus, it is extremely intuitive. Though more limited than other programs, it essentially does everything a student composer would need. Students can sign up for an account with a Gmail address and can easily share their scores with each other and their teacher.

CPDL is an bottomless vat of choral music, most of it older than 100 years old and thus in the public domain. Not all music on here is in the public domain. The music that isn't is clearly noted as such.

Choralia offers part rehearsal tracks for a wide selection of choral repertoire. Most of it is Baroque/Classical/Romantic era rep, but there is a good selection of newer works as well (Gjeilo, Lauridsen, Rutter). Sound quality is a little funky, but they do the job.

This is similar to the website Choralia in that it offers part rehearsal tracks for choral music, but this website is devoted to large masterworks. This would be best for choirs who need to learn these works of parts thereof for festivals or competitions.

The lessons found here are for integrating popular music study into general music curricula. The lessons are all standards-aligned and are almost entirely historical, cultural, sociological, and musicological in nature. The lessons can also be integrated into social studies curricula. There are many opportunities in all of these lessons for students to embark on music and cultural research to enhance and deepen their understanding of the music they are learning to play/sing/perform.

Piktochart has both free and premium accounts. This infographic and presentation maker is a fabulous way for students tap into their visual creativity and present research in the form of an infographic. The possible applications of this in music classes are endless.

As with many sites, this one offers both free and premium accounts. This resource contains thousands of recordings of classical music. Even with a free account, students have access to a large number of recordings (though they are not, as one might say, the authoritative or preeminent performances).

This site offers a service that one wishes they had until they realize it exists. Essentially, if offers lists of songs that can be used to teach intervals. For many choirs - both middle and high school - the majority of students have not had proper ear training. A fun and effective way to do this remedially is to use familiar or easy to sing songs that students can reference to develop their ears. This site puts many song titles in one place to help facilitate that.