Here is a set of sight words (used in 1st grade Treasures reading series) flashcards. They are broken down into 10 different colors with 15 sight words in each color group. The students will master the colors and then color the corresponding arc of the included rainbow before proceeding on to the next color in the rainbow. It is a motivating way to keep students practicing their sight words and encouraging mastery. I hope you find it useful for your students as well!