I have issues with this too...it's hard finding books on it...everything is in yale. There are a few apps and things though that are helpful. ChiDin is quite good. It will give you words and radicals in both the jyutping and pinyin. You can search in English or Chinese which is really helpful. If you pay for this site you get some good tools in jyutping as well....though the character writer is still broken. tilespeak.com has a mahjong game you can play with several hundred characters...it can be set to jyutping. If you find more please list them....I would love even finding a textbook.