This is a useful chart, which shows the various ways that certain sounds can be spelled. I teach Reading and Math intervention to grades K-3, and it's helpful for students to realize how the same sound can be spelled in so many ways. For example, the long O sound can be spelled oa (as in boat), ow (as in snow), o (as in volcano), oe (as in toe), o_e (as in cone), ough (as in dough), and oh (as in oh). Unfortunately, there must be some variations in how certain parts of the country pronounce words, because the examples give for the sound /ar/ are incorrect for my part of the country. For the /ar/ sound (as in shark) the chart says that the words father, palm, are, heart and aunt contain the /ar/ sound. I agree with the words are and heart, but the words father, palm and aunt don't contain the /ar/ sound when those words are said here in Colorado! Another listing on the chart, for the sound /or/ (as in fork) says that the words draw, saucer, core, walk, warm, oar, caught, thought, four, door and broad have the /or/ sound. Here in Colorado, the words draw, saucer, walk, caught, thought, and broad would NOT contain the /or/ sound Very strange, but interesting. Otherwise, the chart seems accurate and will be useful when I work with students.