##
* *Reflection: Unit Exams
Assessment for Line-Sanity - Section 2: Unit Test or Problem Set

After grading my students' unit exams, I was very excited that so many of my students could identify the angle relationships formed once two lines are cut by a transversal. Almost all of my students were able to name and identify these key angle relationships; they also showed a strong knowledge of applying this concept to real-world problems involving algebra.

There were 2 questions which my students did not do so great on. The first, which surprised me, was calculating the slope of a line given 2 points and a graph of that line. Almost 30% of my students thought that a negative slope of 2/3 was the correct answer, when the answer was positive 2/3. To address this, we spent 10 minutes doing a quick game of Simon Says. In this version of Simon Says, you have to follow Simon by moving your arms into different slopes - positive, negative, undefined and no slope. This really helped to review with my students this idea, and also provided a little break from the routine!

The other question which my students struggled with was writing the equation for a perpendicular bisector. Almost all of my students identified the correct perpendicular slope but a lot of them did not plug in the midpoint into the equation. This is something that we will address in a future Do Now, and perhaps, also explicitly review prior to the midterm.

*What Worked - What Didn't*

*Unit Exams: What Worked - What Didn't*

# Assessment for Line-Sanity

Lesson 9 of 9

## Objective: Students will be assessed on Line-sanity units with a summative exam or problem set that covers alternate interior angles, vertical angles, perp lines and other key line relationships.

#### Review of Student Questions

*15 min*

Before taking their unit assessment, you can review the practice unit test which students worked on last class. This is a great opportunity to allow students to ask last minute questions and also ensure that all students have the correct materials (i.e. compass!) for this test.

#### Resources

*expand content*

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- UNIT 1: Introduction to Geometry: Points, Lines, Planes, and Angles
- UNIT 2: Line-sanity!
- UNIT 3: Transformers and Transformations
- UNIT 4: Tremendous Triangles
- UNIT 5: Three Triangle Topics
- UNIT 6: Pretty Polygons
- UNIT 7: MidTerm Materials
- UNIT 8: Circles
- UNIT 9: 3-D Shapes and Volume
- UNIT 10: Sweet Similar Shapes
- UNIT 11: Trig Trickery
- UNIT 12: Finally Finals

- LESSON 1: Proving It
- LESSON 2: Prove It with Angle Relationships
- LESSON 3: Skew Lines and their Friends
- LESSON 4: PTA (Parallel Lines, Transversals and Angles)
- LESSON 5: Flow Proofs and PTA
- LESSON 6: Line It Up!
- LESSON 7: Perp Lines are Perfect
- LESSON 8: Parabolas and Review of Line-sanity!
- LESSON 9: Assessment for Line-Sanity