February 16, 2011

Chinese Method of Multiplying

These are problems Teresa shared in class

Unit Rate and Scale Factor

Unit Rate is always talking about change in rate of a unit.  Change per one unit of measurement.

Scale Factor - if you know how much 2 gallons of gas is you can figure out how much 10 gallons of gas are.

Indirect Variation - not proportional

Percentages - 

25% of $100,000 = $75,000 - so, a loss of $25,000.  This is based off the amount I started with $100,000.  To increase $75,000  to $100,000 it's NOT and 25% increase it is a 33% increase because you are increasing from the amount started with $75,000.

Review for test

Ratios

Van de wall pg. 351 - problem about the flowers growing 3 inches.

Math Snacks Video - Bad Date - great explanation about ratios

Strip Model
(Beckmen softback book) Class activity 7 B


Double Number Line

• Can make quick comparisons using double numberline
• 

Finding lengths using ratios/proportions.

 

Similar objects

 

aaa.study.com

If you Hopped Like a Frog

There are problems at the end of the book that are great for students to do.

Brian Greene says math is the gateway to reality and calls Stephen a bag of particles governed by the laws of physics. (05:58)

The Colbert Report	Mon - Thurs 11:30pm / 10:30c
Brian Greene
www.colbertnation.com
Colbert Report Full Episodes Political Humor & Satire Blog Video Archive

 

Reflection for Jan. 26th Class

I really enjoyed trying to figure out how to model dividing fractions.  This is a tough topic for me to really "grasp".  I still feel like I would have a difficult time explaining the "why" to students.  I liked the example I was able to find online....I posted the PowerPoint slides on my blog.  This example made sense, until we had to work on a more difficult problem and then suddenly I was lost again.  My question is, would I really want to explain this to students?  I worry that explaining it would confuse the students.