The class began with a discussion on percentages. Maria began by showing the class an ad from the Popular Science journal that says that you can save from 500% to 900%. Everybody had a good laugh; Jenny noted that they will pay you 400 dollars for every $100 in merchandise you take from them (for 500% savings)! Jenny wanted to sue the advertiser as a class project. The class then explored other percentage problems. Christine offered a problem about sea turtles: in 1997 they laid 50% more eggs than in 1996, and in 1998 50% less than in 1997. Does it mean that everything is back to where it started from?

Then students compared given statements and tried to find logical conclusions based on the information given. Maria gave an example that a person could die after being hit by a meteorite. The question is: if we see a dead person, does it mean this person was hit by a meteorite? Michelle noted that the person could have died from many different causes, not only meteorites.

Students observed two spaghetti sauce bottles that have plain water in them; a warning on such bottles says "Cover button pops up when the original seal is broken. Do not buy when the button is up." Both bottles had their buttons down; did it mean that the original seal has not been broken, or that the producers lied? Students first said that producers seem to lie, but after more careful observation, they noted that the claim on the bottles does not imply that button down means nobody has opened the bottle. Students tried to figure out how to make the safety buttons on the bottles go down after you open them. Adit joked that you can use some magic; Tomas explained that you can put some hot water in the bottle, and when the air in the empty space later cools down, the pressure will be lower than the atmospheric pressure, so the button will come down. Students concluded that even when the button is down on the bottle, it does not necessarily mean that the bottle has never been opened. Students talked a lot about logical errors, coming up with many things that seem logical, but sometimes are not. If people watch more television, does it mean that a holiday is coming? If more children are coming to camps, does it mean it is a school vacation? If there are less kangaroos in Australia, and more pets, does it mean people have more pet kangaroos? 

Students used a program to create graphs to show the revenue of a company and show how that company is very unstable or how the same company is stable using the same data but different ways to present data! Jonathan used pie charts, Alex used line graphs, and most of the other students used bar graphs. Anne's bar graph was really "jumpy": it took 10 pages for the vertical scale from 99 to 105; she really got the point of instability across! Veronica and Natalie used beautiful fonts for their presentations; Veronica colored the bar graph with special effects.