I have had a few parents and students ask questions about this difficult spelling sort this week. The words chase and chased are regular verbs that just get an "ed" when changed to the past tense. The verb "kneel" is irregular because we don't changed kneel to kneeled. Instead, we say knelt. So, the words bake, walk, and mix belong under chase because they are regular verbs and their past tense forms go under chased. The irregular present tense verbs like think, teach, and drink go under kneel. Here is a picture that may help!