The Rainbow Ukulele Method by Pitch Publications looked interesting and fun so I decided to try it out. Certainly as a starting point I found it full of very useful information, the pack contains PDFs as well as PowerPoints, there are lesson plans, information about starting a ukulele programme, a reproducable student booklet and even helpful letters for parents.
It is aimed at primary / elementary schools but I still found it very useful in a secondary school. Initially all pupils who joined the school club used the method and we all found it a very useful tool to work through together. More recently, we tend to dip in and out of it whilst also using play along videos and using chord sheets.
The bead reward scheme in Rainbow Ukulele is a fantastic tool to keep progress fun and the pupils love to upgrade their keyrings.
A very useful feature of the Rainbow method is the use of colours for different chords. I have actually incorporated the colours (the original colours - they have now been updated) into our ukulele play along videos and find this helps the players hugely.
Dr Chris Russell has written an excellent review of the Rainbow Ukulele Method HERE.