This 10 slide Math Activ Studio flipchart teaches students to represent data with tally marks on a chart. This lesson is aligned with the Houghton Mifflin Math Series, 4.1 - 1st grade. This lesson begins with the “Problem of the Day” in which students are given word problem in which they must solve using the visual manipulatives (plants) to subtract. The student can manipulate and use the “cross out” technique with the visual manipulatives on the flipchart. Next, the flipchart displays the dai