Lesson on estimation
Math Grades: 1, 2
Topic: Estimation and Organizing Data Grade: 1 – 2
Objectives: The student will
1. demonstrate how to organize data by writing down their estimations and actual findings.
2. demonstrate how to make estimations by writing estimations about how many beans can be held.
3. compare their estimates to their actual data in a math book entry.
The activity will last approximately 1 hour.
Materials: paper, scissors, pencil, Kidney beans, chart paper (or white board)
The teacher will read the book, Jack and the Beanstalk. The teacher will remind students that Jack received only five beans for the cow. The teacher then asks, “How many beans do you think Jack would have had if he’d received a whole handful instead of just a few?”
1. The teacher asks the students,” Think about how many jellybeans you think you could hold in one hand?” The students share their estimates with the class.
2. Students are to trace one hand onto paper, cut it out, and write their estimation on the thumb. It is helpful for the teacher to model the procedure.
3. Students are to place jellybeans into their actual hands, to see how many they can hold. The students get into pairs and check the number of jellybeans the other child held.
4. The students are to cut out a small paper bean and write the actual number held onto the paper bean, then glue it to the paper.
5. The teacher will create a large chart which displays children’s estimations and actual findings.
EXTENSION: The children are to arrange their hands in on a class graph.
6. Students are to identify the smallest number of beans held, and place the hand in the first column of the chart.
7. Students discuss possible ways to arrange the hands into columns.
8. Once students agree on how many numbers are assigned to a column, they tape the hands onto the chart.
A class discussion will focus on the various sizes of hands and how many beans were held. Most likely, a few hands will not fit into the larger hands
– more beans, smaller hands – less beans theory. Have students discuss possible reasons why this may have occurred. To find more accurate data, have students trace their hands again, this time keeping their fingers together. Talk about the outcomes of the second activity.
Students will write a paragraph about the hands and beans activity. They are to talk about the relationships between the size of the hands and the amount of beans.
The teacher will monitor the students participation during the activity. In addition, the teacher will read the findings recorded in each student’s journal.
Burns, Marylin. (1996). 50 Problem Solving Lessons . New York: Math Solutions Publications.
Regniers, Beatrice Schenk. ( 1985). Jack and the Beanstalk. New York: Collier Macmillian.