Return to Mathematics IndexWinnie Koo - Ravenswood SchoolLearning with Links

Winnie Koo Ravenswood School

4332 North Paulina

CHICAGO IL 60613

(773) 534-5525Objective(s):

Discuss and demonstrate the meaning of counting, measuring, and estimating of

objects.Materials Needed:

Four boxes of plastic links of different colors.Strategy:

Using handson activities to help students understand the concept of counting,

measuring, and estimating.Activity of Counting(1) Explain and demonstrate the meaning of "counting" (write the word "counting" on the board) using example such as money, fingers, or furniture inside the classroom, etc. (2) Show students what a link is (write down the word "link" on the board) and ask a few students to come up counting certain amount of links on the tables to see if the students know how to count. For example, ask the students to count 5 links, 10 links, 15 links, and so forth. (3) Ask students if they still have any question on how to count. If they still have question, repeat step 1 and 2 with different examples until they all understand the concept of counting.Activity of Measurement

(1) Separate students into groups and distribute a box of links for each group.

(2) Demonstrate to students how to put the links together to form a longer

link.

(3) Ask each group to form links of different number such as links of 5, 7, 10,

and so forth, to see if they have any trouble in doing it.

(4) Tell students we can use these links for "measurement" (Write the work

"measurement" on the board) and tell them the word "measurement" means how

long or how wide something is. Show students some examples until they

understand the meaning of measurement.

(5) Distribute the handout to each group.

(6) Ask each group to turn to page 1 of the handout and ask who can tell what

is going on in the first picture (listen to the response, give praises to

those whose answers are correct).

(7) Tell students the name of the boy in the picture is Julio and Julio's arm

is 12 links long. Have students construct a length of 12 links to see how

long is Julio's arm.

(8) Repeat step 7 with the rest of the picture on page 1 and 2.

(9) Now ask students of each group to measure two of their body parts and to put

down the data on the sheet, including a picture of the body part they measure.

(10) Pick some students to report the result.Activity of Estimation(1) Write down the word "estimation" on the board and tell students the next activity is about estimation. Tell students that we can also measure things in a different way called estimation. But estimation is different in a way that it does not tell the exact measurement of a thing. What it means is that estimation is a way to guess how long or how much is a thing. (2) Ask for a volunteer. (3) Take out a pen or a pencil. Ask the student how many links does it take to find out the length of the pen or pencil. (4) After the student gave the answer, ask him or her use the links to find out the exact length of it. Then ask the student how many link(s) of his/her answer is/are off from the actual answer. The student's answer should be closed to the exact answer. This example tells what it means by estimation. (5) Do the estimation activity on the handout.Performance Assessment:

Through the activities and by working on the work papers, students will be

assessed how much they have learned from the lesson.Conclusions:

Students should have a solid understand of the concept of counting, measuring,

and estimating.