I am a Kindergarten teacher and we use Scott Forsman Reading Street for our Reading program. The program has 40 high frequency words that are introduced throughout the year. You can print these cards on cardstock and laminate to make them more durable. The student who has the green card with the * is the one that begins the game. I always use this when I have a few minutes to spare before recess or specials. I make it fun by timing it! We try to beat our time each time! They love it!