Here's an intervention for spellers who are frustrated with words that don't follow the rules. I usually add one or two of these to each week's spelling list as "bonus words" or "challenge words". Explain to the student that irregular, or exception words have a part that doesn’t follow the usual sound-symbol correspondence rules. Many common words like said, are, and was, are examples. Draw attention to the irregular part of a word by writing the letters larger and/or using a different color. For example, in the word said, print the ai larger or in a different color.