Lesson plan

Compare two 3-digit numbers by looking at the number in expanded form using a game

teaches Common Core State Standards CCSS.Math.Content.2.NBT.A.4 http://corestandards.org/Math/Content/2/NBT/A/4

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Big Ideas: Looking at a 3 digit number in expanded form helps decide which has a greater value. The value of a digit is determined by its place within a number. Numbers can be compared according to their values (< means "less than", > means "greater than", = means "equal to"). This lesson builds on students' work with base 10 and comparing numbers. Students play a game selecting a 3-digit number in expanded form and compare that number with a partner’s. Students identify the larger number, explain how they know and record their comparisons on a game worksheet. The mathematical concepts taught in this lesson build toward a well-developed understanding of the base 10 number structure. This will allow students to manipulate and make sense of numbers that are more complex. Vocabulary: compare, equal, expanded form, digit, value, place, more than, less than, greater than, less than, number, word form, number parts Special Materials: Printable Arrow Cards Gameboard