Lesson plan

# 7. Use three-digit numbers to win a contest! (A)

teaches Common Core State Standards CCSS.Math.Content.2.NBT.A.1 http://corestandards.org/Math/Content/2/NBT/A/1
teaches Common Core State Standards CCSS.Math.Content.2.NBT.A.1a http://corestandards.org/Math/Content/2/NBT/A/1/a
teaches Common Core State Standards CCSS.Math.Content.2.NBT.A.1b http://corestandards.org/Math/Content/2/NBT/A/1/b
teaches Common Core State Standards CCSS.Math.Practice.MP3 http://corestandards.org/Math/Practice/MP3
teaches Common Core State Standards CCSS.Math.Practice.MP4 http://corestandards.org/Math/Practice/MP4
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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Lesson objective: Apply place value concepts of hundreds, tens, and ones, to solve for the total amount of points.

This lesson provides an opportunity for students to apply their knowledge and understanding of place value to a real-life situation. Students are asked to determine the amount of points Emily has and whether or not she will have enough to get her two prizes.

Key Concept students will use:

• the three digits in a three-digit number represent the amount of hundreds, tens, and ones, from left to right

Skills students will use:

• composing ten tens into a group of a hundred
• composing ten ones into a group of ten (Grade 1, Unit 1)
• combining hundreds, tens, and ones (Grade 1, Unit 14)

Students engage in Mathematical Practice 4 (Model with mathematics) as they use a table to help them to organize and analyze the situation, then compare their solution with the prizes and see if their solution makes sense.

Key vocabulary:

• hundreds
• equal
• ones
• representation
• tens

Special materials needed:

• base ten blocks