# KidZone MathHalloween Graphing

Kaitlyn did this count and tally activity taking pictures as she went to share her thoughts with our viewers.

## Materials:

• Bag of brown and orange smarties (or similar candies in brown and orange).  If working with a group of children, you can buy a large bag and use it to make your own small ziploc snack bags of them.  There should be no more than 30 of each color in the bag.

• Templates (see below)

## Image Summary of Printable Worksheets:

 prediction estimate tally bar graph (color)   or   (B&W) (color)   or   (B&W) (color)   or   (B&W) (color)   or   (B&W)

## Introduction:

The Halloween graphing projects build on each other and are, therefore, suitable for grade 1 through grade 3.

Grade 1 students should do the predictions and tally worksheets.

Grade 2 students should do the predictions, estimation, and tally worksheets.

Grade 3 students should complete all the worksheets:  predictions, estimation, tally and bar graphs.

Note:  Every child is an individual.  As with everything on the website, these grade levels are just a suggestion.  Ability of the child, level of supervision and size of the group all play a role in whether the project is suitable.

## Project 1:  Predict the Number of Candies

Talk to the children about "predictions".  A prediction is a fancy word for a guess about the future.  Predictions can be made lots of different ways:

• It can be based on scientific information like a database of statistically valid samples.

• It can be based on previous knowledge -- like what happened last year.

• It can be based on chance -- ex:  if I roll dice and it's an even number, there will be more orange candies.

• It can be based on superstition -- ex:  if I see a black cat the day before, there will be more brown candies.

Encourage the children to chose the way they want to make their predictions.

## Project 2:  Estimate the Results

An estimate is a calculated guess of the approximate amount of an item without having exact information.

Divide the smarties into two separate piles.

Estimate how many brown smarties and how many orange candies are in your piles.  Don't count!  Just estimate.

## Project 3:  Tally the Results

Tally marks are a quick way to visually count a large number of results.  Rather than trying to keep track of a count, you make a tally mark for each item, then you can count the tally marks (by 5's).  This is an intermediate step for graphing.

## Project 4:  Bar Graph the Group's Results

Using your tally worksheet (or starting from scratch), make a bar graph of your bag of Halloween candies.