This Music site is an amazing site to use in KS4 classes as it contains multiple exercises, training and lyrics.
Learning and Teaching Resources
Vocalist.org.uk has some great exercises you can use to liven up any Music lesson, aimed at beginners level and jargon free. The exercises have been split into different sections which include breathing, fitness, pitch (ear training), posture and vocal exercises to allow for extra information to be added.
Each section also contains links to related articles and external links to resources, lessons and further advice on each subject. Additional sections include advice and exercises on learning lyrics, sight reading and a list of books for singers.
Singing Teachers Corner
The site also has a very useful Singing Teachers Corner where teachers can drop in and find information, articles, educational periodicals & books, resources, lesson plans and freebies to help you organise your music lessons more effectively.