Grade: K Lexiles: The articles in this set range from 180L to 450L Differentiation Articles This set provides challenge articles to help you differentiate for your students. Students who are interested in the topic read and comprehend at a higher level. So match challenge articles with your students' interests. Set the Purpose for Students Remind students that words are where humans store knowledge. So they will build their knowledge by reading these articles. They will also increase their vocabulary, improve their reading stamina, and enjoy reading every day! See how to do Article-A-DayTM