: :
506,854 Teachers| 100,313 Schools| 188 Countries Forgot Password

Fictional Scenarios in the Presentation of Mathematics PDF Print E-mail
Friday, 21 November 2008 05:24
In short, these word problems have the effect – despite our intentions – of teaching students that mathematics has no applications, that you should not use common-sense arithmetic to solve them, and that algebra is difficult.
-- Zalman Usiskin, What Should Not Be in the Algebra and Geometry Curricula of Average College-Bound Students?

From the same paper as the above quote is the following problem:

 John can shovel snow from a walk in 4 minutes. Mary can shovel the same walk in 3 minutes. How long will it take them to do it together? 

This is precisely the sort of random and irrelevant problem I have railed against. I shall note also however that the fiction of the world is uninteresting. Here we have a character called John and a character called Mary; why should we care about them? In a story writing class, the above story would get an F.

 A Story through Word Problems 

Creating a fiction is not necessarily about a lengthy back story. Consider these two questions (quoted from a set of six in the comments at this blog):

 It takes Gworghulm the dragon 7 hours to fly across the kingdom. If the Kingdom is 280 miles across, how fast does he fly?

Gworghulm has 47,000 pounds of gold. If his cave has an area of 2000 square feet, how many pounds of gold does he have per square foot? 
In just the situation and the wording of the questions, a fictional universe that students can actually be interested in is being built. (Follow this link to read the rest of the questions.) Be honest: Some of your students are more interested in their English class than their math class. If you plan a lesson with fictional word problems, you have a perfect opportunity to grab their attention. Is the introduction of characters simply a way to force students to translate words into equations? Or is there some thought put into the fictional universe? Will your problems be engrossing enough that students will want to know what happens next in the story? 

A More Extensive Universe

It is of course possible to go farther and teach mathematics as the part of a genuine story. I recommend, for example, Brent Yorgey's Hotel Infinity (from the first four pages). The concept in question (using mapping to compare sizes of infinity) is highly abstract and doesn’t lend itself to any of the usual applications-to-real-life-methods. However, the fictional universe is gripping enough to serve as a substitute. 

Advantages and Disadvantages Compared to Real Life Problems 

Pro: It doesn’t take as much work on the teacher’s part to search for the necessary data or equations from real life. Con: Older students may feel like highly fictionalized scenarios are too “immature.” Pro: Teachers can incorporate concepts that are important in mathematics but are difficult to find directly in real life (like an infinite number of rooms). Con: Any possible excitement gained from work or life-applicability is gone. Pro: It’s possible to have a “running narrative” that returns to particular characters over multiple weeks in the classroom. Finding a work or life-related equivalent to this continuity is difficult. Overall, fictionalized scenarios are the best option when a concept is too abstract to have a real life match. However, what mathematicians really would like is for students to see the beauty of the abstract in itself, separated from any situation. This is why they’re interested in mathematics in the first place. Next time I’ll write about how puzzles might get students close to this, even ones who proclaim no interest in mathematics at all.

 

 

Jason Dyer: Invisible Math HotChalk Blog Jason Dyer holds degrees in Fine Arts Studies and Math and teaches at Pueblo High School in Arizona. His school mascot is the Warriors and his other blog of residence is The Number Warrior.

 POSTED ON HOTCHALK.COM

Comments (1)Add Comment
Fifth Grade Teacher
written by Harry Anderson, February 03, 2009
These ar just great. I used them with my fifth graders and they loved them. Have you written a book using such problems. They really do relate to the SciFi aspect. Do you have a website that includes more?
Thanks.
report abuse
vote down
vote up
Votes: +0

Write comment
quote
bold
italicize
underline
strike
url
image
quote
quote
smile
wink
laugh
grin
angry
sad
shocked
cool
tongue
kiss
cry
smaller | bigger

busy

Digg! Reddit! Del.icio.us! JoomlaVote! Google! Live! Facebook! Slashdot! Technorati! StumbleUpon! Yahoo! Free social bookmarking plugins and extensions for Joomla! websites!
Latest Blog Posts
About HotChalk | Terms of Use | Privacy Policy | Anti-Spam Policy | Contact HotChalk | Advertise on HotChalk | HotChalk Around The World