Vocal Resources:
Solfege:
Ear Training
Quizzes/Games:
https://trainer.thetamusic.com/en
http://www.musictechteacher.com/music_quizzes/music_quizzes.htm
Sight Singing
Resources:
http://neilhawes.com/sstheory/sitesing.htm
https://www.earmaster.com/products/free-tools/interval-song-chart-generator.html
http://thesightreadingproject.com/
Videos For Specific
Vocal Techniques:
Chest Mix/Belting:
Vibrato: