

Dinosaurs  Lesson 6: The Dinosaur's Life Cycle
ACTIVITY: Shake and Spill
Objective
Students practice adding to five and subtracting from five.
Materials
 Five twocolor counters that represent dinosaur eggs; one color is
female, the other color is male
 Container to represent the dinosaur nest
 Paper and pencil to record the results (this is optional, if students have
been introduced to writing number sentences)
Procedures
Part One
 Students put three, four or five twocolor counters in the container
representing the dinosaur nest.
 They cover the container with one hand and shake it.
 They spill the counters on the desk and count how many of one color and how
many of the other.
 They say which set (counters of one color) has more.
 They say the number sentence the counters represent, e.g., two plus one equals
three; three plus one equals four; two plus three equals five, etc., depending on
the number of counters they put into the container.
Part Two
 Students put three, four or five twocolor counters in the container.
 They cover the container with one hand and shake it.
 They spill the counters on the desk and count how many of one color and how many of the other.
 The students compare the two sets to say which set (counters of one color) has more.
 For example, the students put four counters in the container. When they spill
the counters there are three yellow and one red. One student says that set yellow
has two more than set red, because set yellow has two not matched.

