1. Licensing information
Users should treat this material as a working draft. This material can be used in its current form, customized, and/or printed or displayed by the user.
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This material is licensed under the Creative Commons Attribution-Share Alike license: (
Author: Kevin Hall
Wording for the legal statement above is adapted from the legal statement for Trigonometry, published in 2009 by The CK-12 Foundation:

2. Teaching notes
These are NOT lecture notes. Students should try the questions on their own, before you show the answers.
While they are practicing, you want to be walking around praising and prompting them.
Before getting to class, be sure to print out the answers and have them handy. Otherwise you’ll be stuck solving the questions for yourself while they work, rather than walking around praising and prompting students.
Using a remote mouse clicker, you can slowly display the answers. Time it so each answer appears soon after most students have finished that question.

3. 2.1 Bellwork answers
1). 5
Question: How would you change the picture to show ? 9
Answer: I would add one more empty box to the end of the picture.
2).
3). 4
What fraction is shown in the picture below?
Please draw a picture of the fraction . 7
shade in 4 4 7
out of 7
____ out of ____. 3 5 3 5

4. 4). 5). 6). Over and over (every second) Just once Adds on,
$2.80
5).
You are buying 5 tickets to a game. The price is $12.95 per ticket. How much is your total bill? =
2.80
Check ??
$2.80
= $0.70
each.
$12.95 • 5 =
$64.75 4
Cost?
6).
You start out 30 ft. from your car, and you walk away from it at 2 ft/s. What expression represents this situation?
Let s = seconds
car
you
30 ft.
Does the 2 add on just once, or over and over?
2 ft.
2 ft.
2 ft.
2 ft.
expression
Does the 30 add on just once, or over and over?
Does the 2 add on to the 30?
Or does it take away from 30?
Over and over (every second)
Just once
2 • s +
Adds on,
because you’re walking away. 30
What do you think?