Early lessons involve creating sequences and working with loops. We use 2Simple's Music Toolkit to cover a lot of the objectives, but also make use of some web sites too.
An old favourite is the BBCs One Studio Sequencer which is no longer being updated but does still work! This is an excellent site for creating sequences and some great tunes have already been made.
Some younger students have been looking at Super Duper Music Looper. There is an online version which although very limited, does show how music can be painted into timelines. The adding of sounds into a timeline is an important skill and students will be developing this type of skill throughout the module.