Which is the best candy deal?

135 pieces for $14.9990 pieces for $6.9995 pieces for $9.9950 pieces for $6.99150 pieces for $14.24

Clicking on any of the above images will open the image larger in a new window.

We found big mixed bags of candy at really good prices ... we think.

Students are asked to decide which would be the best deal and the worst deal on candy.  They can also create their own mixed bags.  This activity has unit pricing, philosophy of candy collecting, and Excel if you would like to use technology.  

Ghost Whisperer

As the Halloween season begins, let your students play a spooky game. How does this work?
GhostWhisperer

Students can play this game online at Ghost Whisperer Crystal Ball and then

  • Figure out why it works.
  • Construct viable arguments
  • Critique the work of others

This activity can be used with any grade level elementary through high school.  Younger students might work with patterns, multiples and order of operations. Older students might work with systems of equations to prove how the Ghost Whisperer works.

How Much Halloween Candy Will You Collect?

Brand new!

How do you judge whose prediction is closest?

In this Halloween math activity, students consider how to determine the best candy haul prediction.  The math ideas of measurement error and percent error are introduced.  Students then predict their own Halloween candy collections numbers and compare their predictions to their actual haul using measurement and percent error.

Make a costume from a sheet

Phil2

Whoops! Maybe I need a larger sheet.

I'm going to make a costume pattern to sell.  People can buy my plan and make awesome, long, full, scary, ghost costumes.  This scheme will be so simple.  Perhaps I'll get rich!

In this activity young students can reason about the potential of a sheet, cut in a very defined circular shape, becoming a Halloween ghost costume. Notions of head diameter, sheet length, "less than" and "greater than" will all come into their reasoning.

Costume spending

Updated!

Jorge the dog dressed up as a witch.

Every year Americans spend lots of money on Halloween and Halloween costumes. Use our updated data on Halloween spending in America to engage your students in an analysis of the ratios and percents of population, participation, and money spent in honor of October 31st.  This activity takes kids through finding parts of wholes as well as ratio, percents and proportion problems.  Beware: the tasks in this activity involve some large numbers as well as some challenging fraction/ratio/proportion problems.

How much should the 40-oz size cost?

We found this chalkboard menu at a coffee shop recently. The shop had prices for the 12-oz (small), 16-oz (medium) and 20-ounce (large) cappuccinos.  And they will also make you 40-ounce cappuccino but they haven't listed the price.

A 40-oz cup of coffee is pretty huge.  What do you think that the price should be?

In this task, students have the opportunity to discover and define a linear relationship.

The activity: Cappuccino.pdf