Take away
http://illuminations.nctm.org/LessonDetail.aspx?ID=L192
A lesson plan for grades 1–2 Mathematics
This lesson from Illuminations helps introduce elementary students to subtraction. The objective is to create a link between students’ experiences and mathematics. By the end of the lesson it is expected that students should have a deep understanding of subtraction and how it relates to their world.
North Carolina Curriculum Alignment
Mathematics (2004)
Grade 1
- Goal 1: Number and Operations - The learner will read, write, and model whole numbers through 99 and compute with whole numbers.
- Objective 1.03: Develop fluency with single-digit addition and corresponding differences using strategies such as modeling, composing and decomposing quantities, using doubles, and making tens.
- Objective 1.04: Create, model, and solve problems that use addition, subtraction, and fair shares (between two or three).
Grade 2
- Goal 1: Number and Operations - The learner will read, write, model, and compute with whole numbers through 999.
- Objective 1.03: Create, model, and solve problems that involve addition, subtraction, equal grouping, and division into halves, thirds, and fourths (record in fraction form).
- Objective 1.05: Create and solve problems using strategies such as modeling, composing and decomposing quantities, using doubles, and making tens and hundreds.
- Goal 5: Algebra - The learner will recognize and represent patterns and simple mathematical relationships.
- Objective 5.02: Write addition and subtraction number sentences to represent a problem; use symbols to represent unknown quantities.
