

10 County Math
Conference

Saturday, 3/14/15
10:30–11:30 
0

An Encounter
with Stewart
Contrary to popular
opinion students come to our math
classrooms with plenty of ideas
about mathematics. Unfortunately,
not all of them are accurate. To
illustrate what I mean here is a
conversation I had with Stewart an
average 6th grade student.


1

Road Sign & Bus Problem
http://dmcpress.org/cmdb75/roadsign/roadsign_s.html
What's the problem with Word problems? At
the heart of the problem is a very simple,
yet powerful idea: making sense.
Extra: A&C
Activity


2 
Number
Town
The number
town activity was inspired by the movie
called the Weird Number. The story
chronicles how a brave fraction, 2/3 stole
some bread in a town inhabited only by
whole numbers and managed to escape the
posse because he could always confuse them
by changing its form.
Weird Number
Video on Youtube link
Family fractions activity link


3 
Fraction Darts
The object of the
Fraction Darts challenge is to "pop"
balloons located on a number line
between 0 and 1.
Here is a glimpse of a game in progress.
Two darts
(5/8 and 3/4) have been thrown so far.
Notice that
3/4 is too small and 5/8 is too big.
What is your next
throw? link
See also
Decimal
Darts.
Watch 5th graders play Darts with a
Smartboard. link


4

Jinx
Puzzle
Pick a
number, Add 11,
multiply by 6, subtract 3, divide by 3,
Add 5, Divide by 2, Subtract the
original number. Why is this called the
Jinx puzzle? [link]
CIESEmath Jinx puzzle lesson [link]
Why the Jinx puzzle works [link]


5 
Pizza
Server Activity
http://www.ciese.org/time/pizza_act2.html
Order
some pies and see if you can
figure out what the prices are
for different sizes of pizza and
number of toppings. (Check out
the toppings.)
In other words, what does their
menu look like? 

6 
Quadrilateral
Pretenders
If you see a shape that
looks like a square, how do you know
whether it really is a square?
With Sketchpad you can use the drag test
to find out.
This test will show you those shapes
that really are
what they appear to be, and those that
are only pretending. link


7 
The
Great Green Globs
Challenge
Everything
you ever wanted to know about Green
Globs but were afraid to ask (Link)
Globs
Blog
entry and Video
tutorial intro (3:40)
Video:
Green Globs meet Parabolas
(3:44)
Neil Cooperman  Green
Globs Contest  video (12:00) 
