New and FUN, your class has to try this! Wow, will this help build fluency in math number sense! Designed for 1st grade, display these pdf slides at the start or end of any math routine and discuss orally the strategies that students use to solve these addition, subtraction challenges on a number line. No worksheets needed for this routine. If you have no smart board, print as a flashcard to share with class. Students will soon understand that verbalizing synergistically their thought proc