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* *Reflection: Unit Exams
Waves and Wave Phenomena Test - Section 1: Unit 6 Test: Waves and Wave Phenomena

I found that for this test, my students' confidence level ended up matching their grade. As I walked around during the lab during the past two class periods and asked students questions, I was able to evaluate how prepared they were for the test. As I graded the tests, I noticed the students whom I felt had low confidence in the material ended up doing poorly and those whom I felt had high confidence ended up doing great. I am still not sure what I would do to improve confidence in students, but I think that is an important aspect that sometimes I overlook when assessing students. I think that students' performance throughout the unit was reflected clearly on the test since the learning targets were assessed formatively with checkpoints during the lessons leading up to the test and then assessed summatively on the test with similar types of questions.

*Students confidence level matches their score.*

*Unit Exams: Students confidence level matches their score.*

# Waves and Wave Phenomena Test

Lesson 10 of 10

## Objective: Students will be able to show what they have learned throughout the unit about periodic motion and waves.

*60 minutes*

The goal of this lesson is to see what students have learned about different types of waves. Students use what they learned throughout the unit about using the wave equation (HS-PS4-1), wave particle duality (HS-PS4-3), periodic motion and other wave phenomena. Students use many different skills to show that they learned about waves. These include using the wave equation model we developed (SP2) to solve problems using computational thinking (SP5). Additionally students explain their reasoning for a solution (SP6) and support their ideas with evidence (SP7).

One part of the test includes students using what they know about the different wave characteristics or phenomena to analyze what they see and/or hear in a video. They must identify which characteristic is exhibited in each video. Students not only need to know and understand the characteristics but they also have to be able to match it to a real-life event as well as explain their answers. This section of the test focuses on explaining their reasoning (SP7) after identifying the correct characteristic. The videos include: a fire truck exhibiting the Doppler effect, Miss Congeniality exhibits resonance, and constructive and destructive interference with a Slinky.

Another section of the test focuses on the quantitative aspect of the unit where students use the wave equations and relationships between frequency & period and frequency & wavelength to solve problems. This section of the test requires students to use models that we developed in class (SP2) as well as computational thinking (SP5) in order to solve problems.

The last section of the test focuses on matching and short answer questions that require students to use their qualitative knowledge about the different concepts including parts of a wave, wave phenomena and periodic motion. These questions range from identifying types and parts of waves to rank them to explaining with evidence whether light could be a wave or a particle (SP7). Students must use multiple areas of thinking to complete this section including in engaging in argument from evidence (SP7) and using pictorial models to identify wave characteristics (SP2).

The next class period I hand the tests back to students to look over. I go over the major errors made as a class that I noticed and discuss what the correct answers are so students can learn from those. Students have an option to retake if they come in and complete test corrections.

*expand content*

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- LESSON 1: Period and Frequency of a Pendulum
- LESSON 2: Periodic Motion and Waves
- LESSON 3: Wave Relationships
- LESSON 4: Making Waves and Determining Mathematical Relationships
- LESSON 5: Using the Wave Equation to Solve Problems
- LESSON 6: Be the Expert: Wave Phenomena Jigsaw, Day 1
- LESSON 7: Be the Expert: Wave Phenomena Jigsaw, Day 2
- LESSON 8: Wave Lab Stations, Day 1
- LESSON 9: Wave Lab Stations, Day 2
- LESSON 10: Waves and Wave Phenomena Test