Measuring Length in Inches and Centimeters
...
Subject Area: Mathematics (B.E.S.T.) | Grade Level: 4
Lesson Length: 45 minutes
Keywords/Tags: Measurement, Length, Metric System, Accuracy
Lesson Description: In this lesson, students will be able to demonstrate knowledge of measurement after viewing the video provided. This includes inches and centimeters as well as decimal conversion for accuracy.

  • MA.4.M.1.1 Select and use appropriate tools to measure attributes of objects.
  • MA.4.M.1.2 Convert within a single system of measurement using the units: yards, feet, inches; kilometers, meters, centimeters, millimeters; pounds, ounces; kilograms, grams; gallons, quarts, pints, cups; liter, milliliter; and hours, minutes, seconds.
Video : Measuring Distance
Instructions: Please watch the following video as many times as needed before starting to go through other lesson pages. Understanding the content of the video is very important since the lesson activities will be all about this video content. Feel free to participate if you have the materials that Rob uses.
Quiz : Measurement and Distance
Instructions: Please complete this quiz by choosing the correct answer for each question. You can take this quiz as many times needed.
Question #1
Using your pinky as a measurement tool is the most accurate way to measure.
Question #2

Which two standard unit of measurements are on a ruler?

Question #3

What tools are even more accurate than a ruler?

Question #4
Centimeters and millimeters are on the metric side of a ruler.
Question #5

How many ways are there to divide an "inch" when determining accuracy of measurement?

Question #6
When dividing an inch by units of 10, each equal part represents 1/10 of an inch, or .1 inches.
Question #7

Sally measured her cell phone with a ruler. She says that it measures 6 inches and 4/10 of the next inch. Write this as a decimal. 

Question #8
When you divide an inch into halves once, each equal part is 1/4 of an inch. 
Question #9
It is typically easier to divide an inch into 10s than it is to divide it into 2s.
Question #10
Provide an example of a device used to measure longer distances from the video.
Resources : History of Measurement - https://nrich.maths.org/2434
Instructions: Feel free to read this article to get a better understanding of larger measurements, and try some for yourself!
History of Measurement
A little background information on measurement.
Resources : Measuring Pencils - https://www.teachingideas.co.uk/length/measuring-pencils
Instructions: Please see additional external resources below. Feel free visit each link to learn more about this lesson.
Measuring Pencils
Worksheet to practice.
Resources : 20 Clever Ideas for Teaching Length
Instructions: Please see additional external resources below. Feel free visit each link to learn more about this lesson.
20 Clever Ideas for Teaching Length
Tons of fun ways to measure length!