Related Resources for Number and Operations in Base Ten
Classroom Video Visits: Word Problem Clues
Tracy Lewis leads a reengagement lesson with 2nd grade students on the language of word problems, helping students to use word clues to identify mathematical operations. Students explore errors and strategies as they look together at student work. In addition to the lesson, the multimedia documentation of Tracy Lewis's teaching includes a preteaching planning conversation with Anthony Rogers, Leslie Thornley, and Camille Paris, and a followup faculty debrief with observing teachers.
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Number Talks: Number of the Day
Stephanie Letson engages her 2nd grade students in finding multiple ways to write equations that result in the number 170. She introduces her students with some norms for their learning, such as listening, sharing, writing. She introduces the day’s number by asking them what they notice about the number, and what those noticings (multiple of ten, even number) might mean for their equations. Students work individually, then share in small groups, then share as a whole group. Letson facilitates their discussion and follows student insights when they are offered.
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Number Talks: ¿Cómo Se Suma? / How Do We Add?
Katie Arrillaga engages her 2nd grade Spanish bilingual students in a discussion about strategies for mentally solving a problem involving twodigit addition with regrouping. The students share their strategies and evaluate each other’s approaches for solving the problem.
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Classroom Video Visits: Number Operations
Becca Sherman shows 4th grade students that "a picture is worth a thousand words" to represent multiplication and division. Sherman's students use the Singapore Bar Model to discuss strategies for solving multiplication and division problems, and work in small groups to analyze other students' strategies for doing the same. In addition to the lesson, the multimedia documentation of Sherman's teaching includes a followup faculty discussion of the lesson
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Number Talks: What’s the Savings?
Debbie Borda and Antoinette Villarin engage their 7th grade students in mentally calculating the savings received by a student who paid $54 for an item that was discounted 40%. The students in the class first think their way through the problem, then share their strategies with a partner, then share strategies and answers with the class as a whole.
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Base Ten Menu
Liz O'Neill leads a reengagement lesson on composing and decomposing numbers within twenty. Students engage in a variety of activities to think of ten in as many ways as possible, to compose and decompose numbers in a variety of ways, and to justify their thinking. The lesson includes pre and postassessments. In addition to the lesson, the multimedia documentation of Liz O'Neill's teaching includes a preteaching planning conversation and followup debrief with coach Kris Acquisti.
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Here, we have collected many different resources to guide and support mathematics teaching and learning on Number and Operations in Base Ten , including tasks developed by Mathematics Assessment Resource Service (MARS), videos, and more.
Grade 1
Problems of the Month
Grade 2
MARS Tasks
Problems of the Month
Grade 3
MARS Tasks
Problems of the Month
Grade 4
MARS Tasks
Problems of the Month
Grade 5
MARS Tasks
Problems of the Month
