Count to tell the number of objects. Materials Whole class: tree work mats, counters, number cubes marked 1, 2 and 3, large picture cards. During whole group time, read the following story off Picture Card and show it to students. The teacher will roll a number cube marked 1, 2, and 3 and teacher can then ask the class, "How many students are on the tree now?". The teacher then asks students: How can we find out how many birds are in the tree?