I just stumbled onto a pretty neat resource for all math teachers (parents too). It is Glencoe's Online Study Tools. What they have is online, multiple-choice tests, quizzes, and standardized test practices, for ALL middle and high school topics.
They are randomly generated so you can get as many different quizzes as you like.
Just choose any state you wish (it doesn't matter), then a book or course (such as algebra or geometry), and then you'll see the list of topics. In other words, you don't have to own the book in order to do the quizzes and tests.
Jumat, 05 November 2010
Mathematically Interesting Buildings
Just yesterday I read this interesting article, so I thought I'd pass it on. It's a list of 9 most mathematically interesting buildings in the world... each one has something different that is interesting about them - from pi and symmetry to asymmetric hyperbolic paraboloids!
It includes the Great Pyramid, The Eden project, Sagrada Familia, the Gherkin, and some interesting-looking buildings I had never heard of.
It includes the Great Pyramid, The Eden project, Sagrada Familia, the Gherkin, and some interesting-looking buildings I had never heard of.
Kamis, 04 November 2010
Houses/workers/days problem (direct and inverse variation)
Today I want to feature a great video from a fellow blogger and Youtuber, Dave Marain. He solves this question, which at first can sound intimidating:
It sounds like you'd need algebra, proportions, inverse or direct variation, etc. And true, you could use those. But his method completely avoids all that and is based on setting up a simple TABLE, AND using common sense!
See the video below:
And here's a link to his other Youtube videos: www.youtube.com/user/MathNotationsVids.
If 10 workers can build 3 houses in 60 days, how many workers are needed to build 5 houses in 40 days?
It sounds like you'd need algebra, proportions, inverse or direct variation, etc. And true, you could use those. But his method completely avoids all that and is based on setting up a simple TABLE, AND using common sense!
| HOUSES | WORKERS | DAYS |
----------------------------------
| 3 | 10 | 60 |
----------------------------------
| 1 | 10 | |
----------------------------------
| 2 | 10 | |
----------------------------------
| 5 | | |
----------------------------------
See the video below:
And here's a link to his other Youtube videos: www.youtube.com/user/MathNotationsVids.
Langganan:
Postingan (Atom)
