## Reflection: Interval Notation - Section 2: Bell Work

I was surprised when one student in each of my classes ask which range do you mean.  I asked the students to clarify.  The students brought up how range is used in analyzing data. I asked the students to read the prompt. "Does the prompt give you a clue to which range?"  Each one said oh you want "y or output".

As soon as I see the word domain I do not even think of range as analyzing data.  This was a great opportunity to teach a reading skill, using contextual clues. Students do not think about using the context of the problem to understand a term in mathematics.  Using context also helps students understand whether (3,6) is an ordered pair or interval notation.

Domain and Range
Domain and Range

# Interval Notation

Unit 2: Functions and Piecewise Functions
Lesson 1 of 15

## Big Idea: Explore the different methods of writing intervals in describing domains, ranges and intervals describing graphs.

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Standards:
Subject(s):
Math, Precalculus and Calculus, range, domain restrictions, 11th Grade, 12th Grade, interval notation, function, Mathematical literacy, function
60 minutes

### Katharine Sparks

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