Tuesday, January 13, 2009

Accelerated Math 7
In statistics, we use several types of graphs to illustrate data. They say a picture is worth a thousand words. In class today the picture was worth about 20 data points that made no sense expressed as a list but made a very clear point when expressed as a box and whisker graph. Then we translated the data into stem and leaf graphs. Finally we drew an example of a histogram just like the ones they will need to do on their exams.

Accelerated Math 8
This year I have a math 8 class that actually gets very emotional and very opinionated about mathematics. It's usually a pleasure to argue with them and today was no exception. We discussed several problems from last night's homework which is a summary of our work in graphing straight lines. The class had many questions and I hope received satisfactory answers. But they didn't agree with everything. They're thinking. And that's great. I hope to finish our discussion of the homework tomorrow.

Friday, January 9, 2009

Accelerated Math 7
Cows and feed were the topic today. The problem today was to take the number of pints produced by ten cows before and after feeding the cows a new feed. We created two Box-and-Whisker graphs to illustrate the difference in output. Then the kids took Quiz 12.

Accelerated Math 8
I wanted to give the class a quiz today but the scores on the last quiz were a little low for this class. I decided to give them a quiz next Friday (Jan 16) and count the larger of the two grades twice.
Today’s material was difficult. It involved using the point-slope form for the equation of a line. I’ve posted short demonstrations of some selected problems for review. Let me know if they help.

Using Point-Slope Formula prob 2
Using Point-Slope Formula prob 3
Using Point-Slope Formula prob 4
Using Point-Slope Formula prob 5
Using Point-Slope Formula prob 8
Using Point-Slope Formula prob 11