6.6 The Centimeter Objectives: To introduce the centimeter as a unit of measure in the metric system; and to provide experience measuring and drawing line segments to the nearest centimeter. Math Journal 2----- pages 120, 121, and 122 Home Link 6.5 Math Masters 177, 178, 313 and 328, 319 (optional) Minute Math pages 86 and 87 Base 10 Blocks (longs and cubes) slate ruler with centimeters pennies and other identical objects interlocking cubes (optional) paper clip and heavy paper or cardboard meterstick, yardstick Note: Any animation on slides is only visible in the slide show mode.
Math Message: Take one long. Measure it with both edges of your ruler. Homework Follow-up: Names for 14 14
Do you know what these words mean: inch foot yard mile cm centimeter metric system Today we are going to learn to measure in centimeters.
Great measuring online teaching activity for a large group: Estimation of Length This video is about inches and feet, but helpful for understanding length. This online page has photos of items measured in the metric system: http://www.mathsisfun.com/measure/metric-length.html
Draw a line about 10 centimeters long on a piece of paper. Estimate how many pennies, lined up side by side would be needed to make a length of about 10 centimeters.
Partner work: Use longs to find the approximate length of the longer side of your math journals.
Now, use your longs to measure the length of a: pencil the width of a chair the length of a shoe Record two of the measurements in the table at the top of journal page 120.
Thinking time . . . be ready to answer: What color are you more likely to spin? What color do you predict the spinner will land on next? What would happen if you continued to spin 100 more times?
Predict what color you are more likely to spin. Why? http://www.shodor.org/interactivate/activities/AdjustableSpinner/ This is an Adjustable Spinner the teacher can adjust to let children understand which color is most likely to be selected.
Math Masters, page 178 What is a meter?