
Duolingo Music (iOS)
Duolingo Music can be used for free, but does offer in-app purchases.
“Why Music? Well, studies show that learning music helps with reading, verbal, listening, and math skills. It can even delay the cognitive decline associated with aging. Though music education has many benefits, more than 3.6 million students in the U.S. don’t have access to music education… with the new course, anyone can learn music literacy, including reading and identifying notes and playing familiar songs.”

Good Ear
This is a simple but effective tool for ear training practice. If you’re not sure where to start or would like to specifically focus on jazz chords, Good Ear is a good choice.

Rock Hall EDU
Users will need to create a free profile to access this site’s content.
Want to learn more about the history of the music industry? Maybe you just want to know what your parents mean when they say Chappell Roan reminds them of Madonna. Access podcasts, videos, articles, historical documents, playlists, and more brought to you by the Rock & Roll Hall of Fame.

Music Tech Teacher
This site contains step-by-step music worksheets, quizzes, games, and more!

Musictheory.net
While musictheory.net is free, they do advertise paid apps on their site.
Musictheory.net is a great practice tool for all levels of experience. They have lessons explaining the basics, but advanced students of theory can give the Neapolitan Chord section a try if they want a challenge!

Musicca
In addition to music theory exercises, Musicca is an fantastic resource to deep-dive into fundamental elements of written music. Their library includes lessons on the staff, clefs, accidentals, and keys!
“Musicca enhances your ability to read, write, and play music through effective exercises and engaging content. For free, forever.”

NY Philharmonic Learning Resources
“Our education programs empower all listeners and creators to make their own connections to orchestral music. From games that introduce preschoolers to musical basics to activities that inspire elementary, middle, and high school students to compose, our resources support learning at home, at school, and even on the go. Have fun with student-focused activities that explore a range of composers and topics.”

Noteflight
While Noteflight’s basic features are free, they do advertise paid and Premium features and services on their platform.
“Create, play, and share your music compositions with Noteflight’s easy-to-learn online music notation editor. Noteflight includes a comprehensive suite of cloud-based music notation, playback, and sharing tools! Whether you’re composing, editing, importing, playing, or sharing, you’ll enjoy creating and collaborating in Noteflight.”

Sight Reading Factory
While Noteflight’s basic features are free, they do advertise Premium features and services on their platform.
“Regular sight reading practice is the key to improving your sight reading ability, but it requires a lot of new material. Sight Reading Factory’s unique algorithm for composing music on demand makes practicing sight reading easy & fun. You’ll never practice the same music twice!”

Teoría
This is an excellent place to access tutorials for reading music, recognizing intervals, practicing scales and chords, and learning harmonic functions and musical forms.
Teoría also offers exercises for ear training and sight singing!