# 3. Building and comparing towers (FP)

teaches Common Core State Standards CCSS.Math.Content.K.CC.C.6 http://corestandards.org/Math/Content/K/CC/C/6
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2

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Lesson objective:  Fluently compare two sets of cube towers  (up to ten) to see which is greater than or less than. Students will practice using compare words, greater than, less than  and equal to. ​

This lesson helps to build fluency with comparing sets of objects. Students roll a dot cube and  build a cube tower to match the amount on the dot cube. They compare their tower with a partner.  This work develops students' understanding that groups of objects can be compared using matching, counting or visual strategies. Using dot images, students begin to visualize amounts within six without counting and begin to develop a mental image of quantities. They begin to understand and use compare words, greater than, less than or equal to.

Students engage in Mathematical Practice 2 (Reason abstractly and quantitatively) as they begin to understand the relationship between quantities of objects to make comparisons. Students also will practice Mathematical Practice 6 (Attend to Precision) as they use the compare words greater than, less than and equal to, when explaining their thinking.

Key vocabulary:

• compare
• equal, equal to
• fewer
• greater than
• less, less than
• more

Special materials needed:

For Lesson

• Student game directions - Build and Compare Towers
• dot cube (1-6)
• 20-25 cubes per pair
• ten-frames (one per player)

• Student game directions - More and Less Dots
• dot card images (one set per pair)
• numerals with ten-frames (optional)

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