Second Grade Content Preview
Unit 09
Energizers (5 min)
Below you will find a new spin on some energizers you may have already used in your classroom. Feel free to continue to use the other energizers listed in Unit 01 by clicking here: http://bit.ly/2evd1Dc
Opening (5-10 min)
http://www.estimation180.com/days-1-20.html
Use the Estimation 180 tasks day 1-5 and 42-46 to develop number sense of height and estimation. Estimation is a gate keeper for number sense. If you never have kids estimate, students never get a chance to gut check themselves.
Start the class by asking the estimation question with Day 1: How tall is Mr. Stadel?
Allow a safe place for the students to respond, collecting all student responses. Even if students estimate incorrectly, they will learn to make progress as days move on using information that they already know and making new estimations based on previously learned information. Students will learn to grow in their skills in estimating length as they move throughout the unit.
Optional Unit 09 Activities
How Big is A Foot?
Before reading ask two students (who you know to have different shoe sizes) to count how many steps it takes to get from one point to the other in your classroom. Then, when you see there is a discrepency, use your feet to move between the same two points. Ask the class which number is the correct distance? Then ask why were all the measurements different.
Next, to further develop the purpose of a standard unit of measurement listen to the book "How Big is a Foot" (linked in the video below).
Have students use a ruler to measure out the length of the foot size of the tallest man recorded to live-Robert Wadlow (pictured below). His foot was measured equivalent to 47cm (18½ in) long.
Last have students estimate and measure their foot size. Then have them trace their footprints and follow with writing the following sentences:
- I estimate my foot is _____ centimeters long. My foot is actually ______ centimeters long. The difference between my estimation and my foot length in centimeters is _____.
- I estimate my foot to be ______ inches long. My foot is actually ______ inches long. The difference between my estimation and my foot length in inches is ___.
- My foot is approximately the same length as ___________.
- My friend _________'s foot is ________ centimeters long. The difference between my foot length and my friend's foot length is ________.
- My teacher's foot length is __________ inches long. If we combine our foot length together, it would be about _________ inches long.
Measuring with Kopano
Open the page tackk.com/8pu3sw and share the story of Kopano, the new baby giraffe born at the Dallas Zoo.
Tell students to pay close attention to the backgrounds in the videos because they will use them to try to make a good estimate of the height of the adult giraffe.
Show the photograph labeled “Act 1” and have students write down their estimate of the adult giraffe in feet.
Reveal that Kopano is about 6 feet. How does this change their original estimates? Students should discuss their new estimate in partners.
Click on the photograph to reveal “Act 2”. About how tall is the adult giraffe? How close were the students’ estimates to the height of the adult giraffe?
Fun follow up: Kopano's half sister is born and meets Kopano: https://youtu.be/STioWf9LRrU
Measurement Task Cards with Estimation
Available here: http://minds-in-bloom.com/free-measurement-task-cards/
Literature Connection
One Centimeter Tall:
Use the following page to guide students to find things to help inspire their own poem/story.
1. Guided Math
https://drive.google.com/open?id=1IpTrH0yqGfFi32hWJzXgELpspX5dPOpIaJqq8HBB9gI
3. Review/Preview:
Examples:
Two pairs of eyes makes four eyes. 2 + 2 = 4
Two hands make ten fingers. 5 + 5 = 10
Two insects make twelve legs. 6 + 6 = 12
Two spiders make sixteen legs. 8 + 8 = 16
Fluency:
Adding/subtracting with regrouping with the algorithm practice
generating word problems from equations with regrouping (both addition and subtraction)
Counting coins practice
Closing (5 min): Relate back to learning and language objectives
- Class Journal
- Personal journal
- Partner talks
- Self assessment