Grade 2 - Algebraic Reasoning Unit
The Algebraic Reasoning Unit involves understanding number patterns within properties of numbers and operations in order to answer questions such as:
- How can you prove this number is odd or even?
- How can you use the relationship between addition and subtraction to solve problems in which the unknown may be any one of the terms in the equation?
- Give an equation in which the unknown may be any one of its terms, how can you create a situation to match it? How can you prove that your situation matches the equation?
- How can you show ___ is an even/odd number?
- What strategies can you use to determine a number is odd or even?
- What happens when you add two like odd or even numbers?
Math Concepts and Skills:
The student analyzes patterns in operations and uses the relationships to solve problems.
The student:
- pairs objects in two sets to determine whether a number up to 40 is even or odd.
- represents and solves addition and subtraction problems where the unknown may be any one of the terms in the problem.
- uses skip counting to identify and extend number patterns.
Summative Assessment Task
Students determine how many pink shells Kim found on the beach.
Instructional Tasks/Formative Assessments
Students determine the number of pennies in a jar to start with after more pennies are added to the jar.
Students determine how many nuts Sam the squirrel hides under a rock.
Students determine the number of tables that need to be washed to earn a box of markers.
Students determine how much Mom paid for a peach, if she had 35 cents left over in her purse.
Given twenty goldfish and four fish tanks, students determine if there is an odd or even number of fish in each tank.
Students continue a pattern to see how many pages will be read on the ninth day.