## 01.14.13Writing in Math Class

What on this list have you used and how? What’s missing from the list? How do you think about the relationships between the different types?

**(Lightly Adapted) List of Types of Writing in Math Class (from Paul Powell)**

**Explanation of a Procedure**

A triangle has angle A with a measure of 25°, Angle C with a measure of 60°. What is the measure of Angle B? Explain Your Work:

**Correcting an Error**

Tomfoolery simplified the expression and got an answer of 15. Is Tom correct? Explain why or why not.

**Descriptive Observation**

What does the attached graph tell you about the relationship to temperature and energy use?

**Predictive Observation**

How would the graph change if for one year the average temperature in every month was ten percent closer to the yearly average? How would the total amount of energy consumption change? How would the total amount of energy consumption change if for one year the average temperature in every month went down by ten percent?

**Explanation of Concept**

In the fraction ¼, what does the 4 represent?

**Drafting Word Problems**

Write a question that requires a multi-step equation with the variable x on both sides to solved.

**Inferring a Rule**

What can you conclude about the relationship between the size of the denominator and the value of a given fraction?

**Comparing Two Correct Solutions**

Which solution to the problem is more effective? Explain why by citing specific parts of the solution.

**Articulation of a Rule**

Articulate the general rule for adding fractions by find the sum of fractions a/b and c/d where a, b, c, and d are all natural numbers.