Module 4 lesson 1

​Module 4 Lesson 1

I can measure and compare pencil lengths to the
nearest 1/2 , 1/4 , and 1/8 of an inch, and analyze the
data through line plots.

Materials:

(S) Inch ruler,

1- 8 1/2 ″ × 1″ strip of paper (with straight edges) per
student

Fluency: Compare Fractions (4 mins.)

This tape diagram shows 1 half. (½)

This tape diagram shows 1 fourth. (1/4)

Use a > < or = to compare the two fractions.
½ ____ ¼

Fluency: Compare Fractions (4 mins.)

Now try these...

1/2

1/8

Fluency: Compare Fractions (4 mins.)

Now try these...

1/4 1/8

Problem Set

Concept Development

(30 Mins.)

Cut the strip of paper so that it is the same length as your pencil.

Estimate the length of your pencil strip to
the nearest inch, and record your estimate
on the first line in your Problem Set.

If I ask you to measure your pencil strip to
the nearest half inch, what do I mean?

Open Ended

What was the measurement of your pencil in inches?

Concept Development

Use your ruler to measure your strip to the nearest half inch. Record
your measurement by placing an X on the picture of the ruler in
Problem 2 on your Problem Set.

Raise your hand if your actual length was on or very close to one of the
half-inch markings on your ruler.

It seems that most of us had to round our measurement to mark it on the
sheet. Let’s record everyone’s measurements on a line plot. As each
person calls out his measurement, I’ll record the measurements on the
board as you record the measurements on your Problem Set.

Open Ended

What was the measurement of your pencil to the nearest half inch?

Concept Development

Now let’s measure to the nearest quarter (¼ ) inch.

Is our most frequent measurement different on this line plot?
Why?

Open Ended

What was the measurement of your pencil to the nearest quarter inch?

Concept Development

Our next task is to measure our strips to the nearest
eighth of an inch and record our data in a third line plot.
Look at the first two line plots. What do you think the shape
of the third line plot will look like? Turn and talk.

Open Ended

What was the measurement of your pencil to the nearest eighth inch?

Open Ended

Open Ended

Open Ended

Exit Ticket

​Do in your book and turn in for a grade.