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AKS 4MA.D.6 measure time and objects that exist in the world to solve real-life, mathematical problems and analyze graphical displays of data to answer relevant questions.
Learning Target: I can measure lengths to the nearest half, fourth, and eighth of an inch.
Activating Strategy
Activating Strategy
NUMBEROCK Inches, Feet & Yards Song:
Mini-Lesson
Mini-Lesson
We just finished our Decimal Fractions unit.
Today, we will introduce a new unit of measurement: customary length. This United States form of length measurement uses inches, feet, yards, and miles.
To convert from SMALLER units, you must MULTIPLY.
To convert from LARGER units, you must DIVIDE.
Watch this learning video:
Today, we will measure objects to the nearest half-inch, fourth-inch, and eighth-inch marks by looking at marks on a 1/8-inch ruler. You will get a copy to color-code with me—get three colors ready!
I will use color coding to highlight the different fraction marks on this ruler image. First, I will concentrate on the 1/2-inch marks, which will be marked directly in the middle of each inch. On most rulers, the half-inch hash mark is designated by the longest hash mark. I will color code the half hash marks between 0 and 1 inch and between 1 and 2 inches.
Now, let’s mark our fourth hash mark. Each fourth mark is directly between each half. 1/4 is half of 1/2. Usually, the fourth hash marks on a ruler are shorter than the half-inch marks and a little longer than the eighth-inch marks. Let’s look at our ruler image to see the fourth-inch marks.
This ruler is partitioned into eighths. That means there are 8 equal parts between each inch mark, 8 equal parts between 0 and 1, 8 equal parts between 1 and 2, and so forth. Now that we understand the hash marks on our ruler, let’s label them to connect a ruler and a fraction number line.
Guided Practice
Guided Practice
Practice with me:
Help me measure a few objects in our classroom under the document camera. Notice how I always line up the object with the zero on the ruler so our measurement is accurate.
Now, you and your math partner will get one of your teacher's favorite Papermate pens to measure its length to the nearest eighth inch.
Click the dropdown under the picture to see the answer:
I lined up one end of the pen to the zero mark, and I saw that this pen was more than 5 inches long.
The pen goes one hash mark more than the 5 ½ inch mark, so it is an eighth-inch mark.
One half equals 4/8, so this pen measures 5 5/8 inches.
Practice with your math group:
Now, it is your turn to try...
You and your math group will practice measuring to the half-inch, fourth-inch, and eighth-inch marks. As a fourth grader, you want to be as precise as possible with your measurements, so be careful to align your ruler to the end of each pencil and pay close attention to the hash marks.
Start at the top of the page and measure the first pencil. Share the measurements after each person in your group measures the first pencil. The measurements should all be equivalent. If your measurements are not equivalent, collaborate with your partner/group to determine the correct measurement.
Measure at least 2 pencils. Be ready to discuss the measurements as a whole group.
You will complete the remaining pencil measurements before completing your math rotation today.
When measuring the half-, fourth-, and eighth-inch marks, it is important to be precise and accurate by lining up objects exactly on the ruler's zero mark and considering the fractional marks on the ruler.
Independent Task
Independent Task
1. FRECKLE - Complete THREE Freckle Assignments each week. DUE FRIDAY. Your HIGHEST score in Targeted Practice is your weekly math grade - Click HERE for Freckle website
GRADED Targeted Practice - Current skill (5 questions; Score Goal=80% or higher)
Fact Practice - Multiplication Fact Practice
Adaptive Practice - At YOUR level
2. iREADY Math - Complete 30 minutes at your level each week
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