I learnt a few here myself. 🙂
Acronyms are abbreviations formed from the first letters of words in a phrase.
The most popular here would be ASAP, BTW, ETA, FYI, LOL, OMG, PM, ppl, thx, XOXO
Nice image from facebook.com/EFLpractice
Look at the difficulty of the first exercise in the picture. The sound /ei/ like in “say”. All those spellings have the sound /ei/ or “ay.”
The next exercise shows how a letter has different sounds. In this case the letter a. The / / sounds are not correct phoenetic script sounds but help you understand the sound.
For a free song which will help you with more spelling sounds go to http://letslets.com