Tag: 8th

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…

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…

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,…

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…

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…

Gumballs galore

Gumball Machine Problem from Brian Marks on Vimeo. 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…

Largest Cup of Coffee Ever!

The world record for the largest cup of coffee was recently set (see picture above).  In this activity students explore scale, similar figures, volume and measurement as they estimate the amount of coffee that this record-sized mug holds.  Students also…

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…

Happy Birthday Statue of Liberty

Friday is the Statue of Liberty’s 125th birthday.  Student’s can practice scaling with ratios, multiplication factors, or similar figures as they engage in the news of the day, learn a little about the statue’s history, see some amazing old photos…

Approaching Seven Billion people

To see the present world population, go here.  http://www.worldometers.info/world-population/ During the Fall 2011 the 7 billionth human on earth was born. The counter mentioned above gives updated approximations of the current world population.  When will we hit 8 billion people? …

Occupy Wall Street protest is growing

The Occupy Wall Street (OWS) movement has grown since it began on September 17th.  Students can look at charts that show percent mentions of the demonstrations and calculate the percentage of media mentions, percentage of comment  growth, and the percentages…

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…

Why Does it Stay in Orbit?

On Monday, the space shuttle Endeavor launched for the last time. The six astronauts on board docked this morning at the International Space Station to join the 6 astronauts and cosmonauts who live at the ISS. Combine current events, Earth…