Useful Websites
There are many great websites which offer free guitar tabs and other guitar learning resources which will help supplement your lessons, below are a few of these sites to check out.
Tabs
www.ultimate-guitar.com
This website has one of the most comprehensive collections of Tabs on the internet
Guitar Tuning
www.fender.com/online-guitar-tuner/
The Fender online tuner is great to use if you're caught short without a guitar and you have a computer or phone at hand
Metronome
www.metronomeonline.com/
Metronomes are great tools to use while practising as they help to develop your consistency, timing and your speed
Backing Tracks
www.guitarbackingtrack.com/
Backing tracks are also a great tool to use while practising as they help you to simulate playing along with a band, this site has thousands of free backing tracks to have a play along to
Sheet Music
www.classclef.com/
www.delcamp.net/sheetmusicforclassicalguitar.html
Both of the sites above offer sheet music for thousands of pieces specialising mainly in classical and flamenco