## Throwing up again

Anchorage, Alaska has received more than 100 inches of snow this winter.  The height of the tunnel to people's homes is getting higher and higher. When they shovel an area, they have to throw the snow practically straight up from their path to get the snow well into the surrounding snowbanks.

In this activity students experiment with graphing parabolas and manipulating those equations to try to establish a likely trajectory

## Valentine’s Cardioid

WojciechSwiderski at the Polish language Wikipedia

Happy Valentine's Day!              cardioid.pdf

This PDF contains four ways students can draw cardioids for Valentine's Day.

CCSS: HSN.CN.B

## Negative Exponents? Ugh

This activity/post is a little different than are usual posts.  We look at a particular math concept and consider how to use context, models and CCSS math practices to increase student understanding.  This activity focuses on negative exponents.  Even if you aren't teaching negative exponents, this is a great opportunity to look at non-linear growth or positive exponents.

We use examples of a plant and a beanstalk growing exponentially and ask kids to determine the height of these plants in the future (growing at the same rate).  Students skip ahead several inputs and are forced to consider a rule to model the situation.

## Free Resources for Authentic Mathematics

On Thursday evening Leslie and Brian spoke at Boston College as part of the ATMIM (Association of Teachers of Mathematics in Massachusetts) Winter Conference.  Our presentation was on making mathematics meaningful to students.  We shared, did and discussed math activities from our site with our participants.  We also mentioned other web resources that provide free math activities that are meaningful to students and wish to mention them here as well.

1. Dan Meyer: http://blog.mrmeyer.com/ Patient Problem Solving and hooking students into learning math through the use of video. On the right-hand column of his blog, Dan has a section called "My Curricula" which contains some wonderful activities. Dan's philosophy is presented in this TED presentation.
2. Emergent Math: http://emergentmath.wordpress.com/ Inquiry based activities.

The following are some sites where we find tons of useful data that you can use in your own creations.

Do you have a site that you would like to suggest that has free authentic math problems or activities?  Or do you have a site that offers loads of good stats?  If so, please leave your suggestion in the comments of this post!  🙂

## When is Tebow Time?

Tim Tebow is the talk of the sporting world.  This Saturday he goes up against Tom Brady and the Patriots in the Playoffs.  I keep hearing about "Tebow Time" and I wonder at what point in a game that usually occurs?  Have your students take a look at Tim Tebow's situational stats, by quarter, and overtime to determine when Tebow is at his best.  Ask students to support their claim with graphs or statistics.

## Gumballs galore

Show Brian's video to your class and let your students cogitate, estimate and calculate.

Sheet with only a still shot from the video and room for figuring:

gumball-image.pdf

We have a solution of sorts for members below:

gumball-solutions.pdf

CCSS: 8.G.9, HSG.MG.1, HSG.MG.2 , HSG.GMD.3