Four quadrants

By the end of class, I should be able to:

• Identify the four quadrants of a graph.
• Plot points in the four quadrants.

Language Goals:

• Use complete sentences to describe the meaning of the following terms:
• absolute value
• coordinate pair
• opposites (in respect to numbers)

September Process Words

• Investigate
• Produce

Opening: Group task - Prepare a number line from -10 to 10 using scrap paper

Moving to four quadrants on a graph

You sunk my battleship!

Review of Percents

September 19 - Reviewing Percents

In pairs, we will work through a series of problems to review percents. Please draw out your ideas. We will have a final assessment on Thursday that covers ratios and percents.
Skills practice: PW16

Working with Percents

Opening video:

Video clip from Father of the Bride

*What does Steve Martin want?
*How would the cashier do this (if Steve was not put into jail)?
*What could Steve have done instead?

Strips from last class:
20% strip - ratio of 100:20:80 relates to 5:1:4 (What is the relationship described?)

Questions:
1. During a sale, prices were marked down by 20%. The sale price of an item was $84. What was the original price of the item before the discount?


2. A shop increased its workforce by 25%. If 240 workers were working after the increase, how many worked there originally.

Gridding Percents

Percents (an introduction)

Opening: Video (leg...) In groups, we will work on this problem with whiteboards.
Assessment Review
Percents
Take an A4 piece of paper and hold it landscape:

Cut 5 cm strips from the paper.
One strip stays whole - original
Other strips need a portion cut out: 25% of original, 20%, 12%

*

Problems
(For each, please make sketches as modeled above.)
1. If Strip #1 represents the whole (100%), how much is a 25 % increase? A 25% decrease?
2. If Strip #1 represents the whole (100%), how much is a 20 % increase? A 20% decrease?
3. If Strip #1 represents the whole (100%), how much is a 12% increase? A 12% decrease?
4. If Strip #1 is 30 cm long, how much is a 25 % increase? A 25% decrease?
5. If Strip #1 is 30 cm long, how much is a 20 % increase? A 20% decrease?
6. If Strip #1 is 30 cm long, how much is a 12% increase? A 12% decrease?