Reflection: Developing a Conceptual Understanding Numbers above 100 - Section 3: Independent Practice

You can see this common error on the student paper. Everything is perfect until 120 is reached then there is a reversal with the 2 and 0. This could just be a simple mistake of putting them in the wrong place by the student, but the student really knows it should be 120. Yet, it could be more serious and the student truly believes this is how you correctly write one hundred twenty. Bring it to their attention as soon as you catch the mistake. If necessary, draw a place value chart and show have them help you fill it in by asking;

If I have the number one hundred twenty, how many hundreds do I have? (1, write it down in the hundreds column.) (Grab 20 straws.) How many tens would I have with these 20 straws? (Let the student separate them into 2 bundles.)(I have 2 tens, write that number in the tens column.) Do I have any ones? (No, put a zero.)

Using this technique will give them a concrete and visual method of seeing how the number 120 is formed and written.

Developing a Conceptual Understanding: Supporting Place Value Understanding with Three Digits

Numbers above 100

Unit 2: Building Counting Skills
Lesson 12 of 13

Big Idea: My students have been struggling with numbers from 100 to 120. This lesson is going to concentrate on this range of numbers - recognizing them and writing them.

Print Lesson
3 teachers like this lesson
Standards:
Subject(s):
30 minutes

Jennifer Moon

Similar Lessons

Counting by ones to 120
1st Grade Math » Numbers and Place Value
Big Idea: Count me in! In this lesson students will learn to extend a counting sequence starting at any number.
Favorites(16)
Resources(13)
Lakeland, FL
Environment: Urban

Missing Numbers
1st Grade Math » Count to 100 Every Day!
Big Idea: Young children love a good mystery. This lesson allows them to explore numbers to 100 and how they are structured on a hundreds chart while playing a really fun and engaging Missing Numbers game.
Favorites(11)
Resources(15)
New Orleans, LA
Environment: Urban

Learning To Be A Friendly Partner
1st Grade Math » Counting Quantities
Big Idea: Students will learn how to work in cooperative teams as they play a simple math game. They will be introduced to appropriate expectations and then have a chance to model them. The students will have an opportunity to explore three new math tools, too.
Favorites(33)
Resources(21)
Waitsfield, VT
Environment: Suburban