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Get Full AccessMeasure & Add Length (Intro to the Ruler)
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What you will learn from this videoWhat you will learn
 We'll learn how to measure length using a ruler!
 We will also learn how we can compare length measurements.
 And we'll explore how this knowledge can help us build bridges and compare the sizes of all kinds of toys!

Discussion Questions
Before Video
Add 6 + 7. What method did you use to solve?ANSWER13. I took 4 from 7 to make a ten. 10 + 3 = 13.
55. I added 10 then 1. 44 + 10 = 54. 54 + 1 = 55.
21. I took away 6 to make a ten, then took away 1 more. 26 – 6 = 20. 20 – 1 = 19.
Length is how long something is from one end to the other.
The first line. When they are lined up on the left side the first line goes farther to the right.
After Video
How can you use paper clips to measure the length of an object?ANSWERUse paperclips that are all the same size. Line up the paper clips from one end of the object to the other. Don’t overlap the paper clips or leave any space between them. Count how many paper clips you used. That’s how many paper clips long the object is.
Line up the zero mark on the ruler with one end of the object. The number next to the other end of the object is its length. If the ruler shows inches, the length is in inches.
I should use a yardstick to measure objects that are longer than a ruler.
Inches and feet are units of measurement that I can use to describe the length of an object. Feet are longer than inches, so an object that is 1 foot long is longer than an object that is 1 inch long.
Measure the lengths of both chocolate bars. Subtract the shorter length from the longer length to find how much longer one chocolate bar is than the other. Add the lengths to find the combined length.

Vocabulary
 Length DEFINE
How long something is from one end to the other end.
 Measuring Length DEFINE
Finding how long something is. You measure length with measuring tools like rulers and yardsticks.
 Ruler DEFINE
A tool used to measure length.
 Inch DEFINE
A unit of measurement that describes length.
 Yardstick DEFINE
A tool used to measure length. It is longer than a ruler.
 Foot DEFINE
A unit of measurement that describes length. It is much bigger than an inch. Each foot equals 12 inches.
 Length DEFINE

Reading Material

Practice Word Problems

Practice Number Problems

Lesson Plan

Teacher Guide