NY Next Generation Math NY-6.EE.2.a

Math6th GradeWrite, read, and evaluate expressions in which letters stand for numbers.

The Standard

Write expressions that record operations with numbers and with letters standing for numbers.

New York State Next Generation Mathematics Learning Standards

Teacher's field guide

What Students Need to Do: Students translate words and situations into numerical and algebraic expressions. They preserve the stated order of operations when letters represent numbers.
What Mastery Looks Like: The student writes 5 minus y for subtract y from 5 and 3 times the sum of n and 4 for a grouped quantity. The expression matches each operation and its order.
Common Misconceptions: Students may reverse subtraction or division because they copy the word order. They may omit grouping symbols when an operation applies to an entire sum or difference.
How to Assess It: Ask students to write an expression for seven less than twice a number and explain which operation must happen first.

Lesson moves

Give students operation cards, number cards, and letter cards to build expressions from spoken phrases.
Ask students to explain the difference between five less than n and n less than five.
Play expression match with one set of verbal phrases and one set of algebraic expressions.
Have students write an expression for a taxi fare with a fixed charge plus a cost per mile.

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