Click the metronome to the left to access an online metronome. Best used with one earphone in.
Click the tuner to the left to download Waves--a Google App for an online tuner. Check in your settings to make sure it's optimized for your instrument.
Click the picture to the left to install the Screencastify Google Extension to your Chromebook. You can use this app with Google Drive and submit videos to me through Schoology.