## Reflection: Checks for Understanding Algebraic Expressions Quiz - Section 2: Administering the Quiz

The majority of my students finished the quiz in 15 minutes, with time to check their work and attempt the challenge problem.  The most common mistakes that students made were:

1) When translating the algebraic expression, students didn't apply the operation of "less than" correctly.  They needed to subtract 2 from 3x.

2) Students confused the coefficient with the constant when completing the chart.

3) For problem 4, students didn't simplify the expression completely.  For example, they didn't subtract a from 7a and included a as a separate term. Students forgot that a has a coefficient of 1, which I sometimes referred to as the "invisible 1".

4)  For the challenge problems, students were able to provide one method for finding the perimeter, but didn't remember how to apply the formula for perimeter, P=2L+2W, using algebraic expressions.

In the future when preparing students for this quiz, I think it will be helpful to provide them practice with identifying and correcting these type of mistakes.

Taking the Quiz
Checks for Understanding: Taking the Quiz

# Algebraic Expressions Quiz

Unit 14: Algebra
Lesson 9 of 16

## Big Idea: Students take a quiz on algebraic expressions

Print Lesson
2 teachers like this lesson
Standards:
Subject(s):
35 minutes

### Ursula Lovings

##### Similar Lessons

###### Order of Operations
Big Idea: When evaluating expressions, mathematicians all over the world use the same order of operations to get to the answer.
Favorites(66)
Resources(21)
New Haven, CT
Environment: Urban

###### Show What You Know: Factors and Multiples + Introduction to Exponents
6th Grade Math » Intro to 6th Grade Math & Number Characteristics
Big Idea: What do students understand? What gaps do they have in their understanding? What's greater, 2 to the third power or 3 to the second power? Students take a quiz and then work to understand that repeated multiplication is represented with exponents.
Favorites(41)
Resources(22)
Somerville, MA
Environment: Urban

###### Solving Linear Systems of Equations with Substitution (Day 1 of 3)
Algebra I » Systems of Linear Equations
Big Idea: Students will understand the idea of substitution with symbolic and written comparisons.
Favorites(66)
Resources(22)
Washington, DC
Environment: Urban