Lesson 3-3

LET'S BUILD Count the Number of Objects in Each Category

For more help with this lesson, view the Visual Learning Animation or the Another Look Video.

MATH HELP AT HOME

Sample Additional Practice Exercise 1

Draw a circle around each animal that has 4 legs, draw that many counters in the top ten-frame, and then write the number to tell how many. Mark an X on each animal that does NOT have 4 legs, draw that many counters in the bottom ten-frame, and then write the number to tell how many.

10 animals. The dog, cat, rabbit, lion, bear, tiger, and horse are circled. An X is drawn on the bird, snake, and fish. Next to the animals are 2 ten frames. The first is next to a rabbit. It has 7 counters. The number 7 is written beside it. The second is next to a crossed-out rabbit. It has 3 counters. The number 3 is written beside it.

Count how many animals are in each group: those that have 4 legs and those that do not have 4 legs. Circle the dog, cat, rabbit, lion, bear, tiger, and horse because they each have 4 legs. Count how many animals are circled. Seven animals are circled, so draw 7 counters in the top ten-frame and write 7. Draw an X on the bird, fish, and snake because they do not have 4 legs. Count how many animals are marked with an X. Three animals are marked with an X, so draw 3 counters in the bottom ten-frame and write 3.

HOME ACTIVITY

Button Sort

MATERIALS

Utensils

ACTIVITY

Show your child a group of up to 10 objects that are different in at least one way. For example, show 4 forks, 2 tablespoons, and 3 teaspoons (arranged in random order). Ask your child to sort the utensils into categories: spoons and NOT spoons. Have your child write numbers for each category. Repeat with other categories.