# Formative Assessment: Limits and Derivatives

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## Objective

SWBAT show understanding of limits and derivatives.

#### Big Idea

A partner quiz will guarantee rich mathematical discussions.

## Partner Quiz

25 minutes

I start class today by giving a partner quiz that assesses student understanding of limits and derivatives. I believe that partner quizzes are great opportunities to incorporate mathematical discourse into your classroom. Every group will have at least one question where there is disagreement; it is awesome to walk around and hear your students giving reasons and justifications to support their claims. It is also an opportunity to critique the reasoning of their partner if they disagree (MP3).

One grouping strategy is to order the students from highest to lowest grade in the class.In a class of 30 students, for example, I would go through and match up #1 with #16, #2 with #17, #3 with #18, etc. This way each pair is grouped in a similar way and there is the same differential between each pair. I find that this grouping really encourages conversations because there is never a huge gap between ability levels.

I give my students about 25-30 minutes to work on this quiz. Each student gets their own quiz but I tell them that I will only grade one and each person will get the same grade. I don't specify which one I will grade so I say that they should have the same work and answers on each page. This holds each member responsible.

In the video below I discuss one question from the quiz that I particularly like because it is a great formative assessment to see if students understand derivatives.

## Summarize

25 minutes

For the remainder of the class, students will work on this homework assignment that provides a good summary of our work with derivatives. They are still fairly new to students so I wanted to provide a time to take a breather and put everything together. On the worksheet, students are asked to use the limit method and shortcuts to find derivatives. There are also problems where students have to work with tangent lines and interpret results.