Algebra

These posts help students see patterns and relationships.

Fish tale, go figure

Whoa!  I have two fish in my aquarium.  Betty, my white goldfish always stays really close to the front wall as she swims towards her food.  However, Stripe, my striped goldfish swims diagonally across the tank to the back top…

Pythagorean Theorem

Use this activity to help your students discover the Pythagorean theorem. Pythagorean theorem work is often skill and drill work with contrived right triangle problems.  In this activity students work with a visual representation of the Pythagorean theorem in order…

Watson save

We can’t get enough NFL.  Check out the video above that revisits a truly great NFL playoff play. In the 2005 AFC divisional championship game between the New England Patriots and the Denver Broncos, Benjamin Watson stopped a touchdown in…

Storm cleanup

This activity could be used as an introduction to trig ratios.  Students figure out the approximate length of the huge branch that I have to fell for safety and firewood. After approximating the branch’s length, they calculate how many logs…

Video game download

How long will it take me to download the video game? This can be done as a 3 Act Task.  To get started simply show the video and following picture to your class. ACT ONE: I decided to download a…

Budget 2012

Visit this debt clock website and ask students to make some observations, http://www.nationaldebtclocks.org/debtclock/unitedstates What do you see happening on this clock? When will the U. S. hit the next trillion dollars deficit milestone? How fast is the deficit increasing every hour?

It sure is cold out … or is it?

Students ponder the relationship between place latitudes and average January temperatures while they try to discover a correlation. Is this a linear or near linear relationship? … averaging, missing data for averaging, line of best fit, Google Earth, world locations,…

Linsanity

Jeremy Lin is the New York Knicks most startling player.  His story is exciting in that he graduated from Harvard in 2010 and was not immediately drafted into the NBA.  At first he was playing in the NBA Development League…

All Star Game 2012

The NBA All Star game is being held on February 26th.  Did you know that this was the third major professional sport all star game in the last month. The Pro Bowl and the NHL All Star Game were also…

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…

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…

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…

The Euro and the international debt crisis

Lately the news is filled with talk of the Euro, US foreign debt, the fragility of European monetary systems, and the interdependence of all of these crisis. In this activity students become familiar with the Euro, practice translating the Euro’s…

Parabolic Pee

Mr. Mark’s new little baby can make some amazingly tall streams.  Give your class a little chuckle as you introduce them to parabolic motion with this very short analysis of Mr. Mark’s baby’s talent. CCSS: 8.F.5, HSA.CED.2, HSA.REI, HSG.MG.3  Parabolic-pee.pdf…

QR codes ???

Your students have probably seen these images around and might not know why they are becoming popular for smart phone scanning … and possibly dangerous.  Students figure out the number of permutations of symbols that are possible with these 2-d…