# Category Archives: Math Minute

###### What is your favorite kind of cookie?  Mine is chocolate chip and I especially love my mother-in-law’s recipe that has pudding in the batter.  Yum!

For this week’s Math Minute, you have an opportunity to win a package of cookies for your class.  See the list below for your choice of activities that can get you entered!

• Watch this video about one of America’s favorite cookies.  Jot down some facts as  you watch the video.  Complete this quiz afterwards.  One response per person.  Duplicate responses will be eliminated.
• Oreo Thins have a diameter of 4.5 centimeters and a thickness of 7.5 millimeters.  Write your answers to the following questions on a sheet of paper with your first and last name, school, grade, and teacher.  Have your teacher put it in the “Pony” to Sunset Hills EY.  One entry per student please.
•  What is the Circumference (C = pi * diameter) of an Oreo Thin?
• What is the Area (A = pi * radius squared) of an Oreo Thin?
• How tall would a stack of 10 Oreo Thins be?

image taken from https://www.pdclipart.org/

# #58: Math Video A Day

###### Research has been conducted on the effectiveness of using video in the classroom, and according to one study by Kaltura, video is better than the written word when it comes to information retention, education, and overall experience.

I can vividly remember my 7th grade math teacher showing a video call The Case of the Missing Chick Cows : Adding Positive and Negative IntegersIn the video, the Chick Cows were disappearing all around town and farmers started to blame each other for stealing them, only to find out that at night, the Chick Cows were linking arms and flying away.  Some of the Chick Cows had left wings and others had right wings.  When they linked arms together, they were able to fly away.  Over 30 years have past since I watched that video and I still remember it.  Videos have a way of making information “stick” and we are in a day and age were we have access to a plethora of videos that can help us learn.

For this Math Minute, print off the worksheet, “A Math Minute A Day” and use a QR Code reader to scan the code for each video.  As you watch each video, jot down new and/or interesting information.  What connections can you make?  Which video did you find the most interesting?  Silly?  Entertaining?  Let us know by leaving a comment!

Image taken from: https://www.pdclipart.org/

# #57: Polyhedron

An icosahedron is a polyhedron that has twenty triangular faces.  A stellated icosahedron has each of those faces raised to a triangular pyramid.

Wow!  There’s a lot of big words in that sentence!  Find out more about polyhedrons by visiting this website: http://www.mathsisfun.com/geometry/polyhedron.html

##### How can you spend your Math Minutes this week?
• Post a comment and share something new you learned about polyhedrons.  You are not limited to the website listed above.  When posting a comment, use your first name and school (i.e. Tyler, Sunset).  Do not publish your email.
• Make a Modular Origami Stellated Icosahedron by following these directions: http://www.wikihow.com/Make-a-Modular-Origami-Stellated-Icosahedron  Email a picture of your completed stellated icosahedron to your school’s EY Coordinator.
• Find instructions for making other polyhedron.  Here is one resource: https://www.korthalsaltes.com/  Email a picture of your completed polyhedron to your school’s EY Coordinator.
• Find instructions to make an origami animal using the WWF Together app on your iPad.  Email a picture of your completed origami animal to your school’s EY Coordinator.

We will post pictures of your origami creations on our Student Showcase Wiki.

# #56: Math and Animation

In the Numberphile and TED Ed videos linked below, Tony DeRose from Pixar talks about 3D animated characters and the math involved to make them look so smooth.  It turns out there is a TON of math behind some of our favorite animated films, and it starts with some of the math learned in middle school!

##### How can you spend your Math Minutes this week?
• After watching the videos, click on this link and answer the questions.

Numberphile Video:  http://tinyurl.com/ndvpup7

TED Ed Video:  http://tinyurl.com/onqhkxk

# #55: Coordinate Geometry

Coordinate Geometry is one of my favorite areas of math.  There’s just something about getting a sheet of order pairs and carefully plotting them on graph paper…connecting the dots to reveal a picture.  If that’s your sort of thing too, check out Option 3 below.  Happy plotting!

##### How can you spend your Math Minutes this week?
2. This video gives a musical explanation of the inventor of coordinate plane geometry, Rene Descartes.
3. Print out (or have your teacher print out) these worksheets.  Plot the ordered pairs on the graph paper and reveal a warm surprise!  Take a picture of your completed drawing and send it to the EY Coordinator at your building.
4. Hopscotch is a free programming app that utilizes coordinates plane geometry.  The video link below explains some basics of Hopscotch and another way to spend your Math Minutes this week.  NOTE: Due to app updates, the Hopscotch video may not match perfectly with the up-to-date-version of the app.  After watching the video, create your initials/name in Hopscotch.  Take a picture of your completed program and send it to the EY Coordinator at your building.  We would love to post it on our Student Showcase Wiki!

# #54: Multiplication

###### Multiplication. It is one of the four types of operations you learned in math (along with addition subtraction and division). There are many different ways to multiply numbers. However, sometimes, multiplying really big numbers can be a challenge. Luckily, there are many different techniques you can use to solve large multiplication problems.

How can you spend your Math Minutes this week?

2. Print out (or have your teacher print out) this worksheet. Use the method in the video to come up with answers to multiplication problems. You can check your answers on the second page of the worksheet. If you feel comfortable with those problems and want to try multiplying bigger numbers, then print out this worksheet.
3. Want to learn another math trick? Watch this video for a way to check the answers to your multiplication problems you solved in the worksheets.
4. Use the app Explain Everything to do the problems. Draw out the pictures and send them to your EY coordinator.

*Lesson inspired by multiplication lessons from East Asian schools

# #53: Cribbage

My family enjoys playing pitch,  31, sevens and trash.  However, my absolute FAVORITE game is cribbage!  It involves strategy and math, which is why I like it so much!

##### How can you spend your Math Minutes this week?
2. In cribbage, the Jokers are removed from the deck.
• The Ace is worth 1
• The face cards (Jack, Queen, and King) are each worth 10
• The other cards (2 through 9) are each worth their number value
3. Here are some of the ways you can earn points playing cribbage:

One of the ways to earn points in cribbage is to have cards that add up to fifteen.  In the picture below, the King and one of the 5’s make 15 so that is 2 points.  The King and the other 5 also make 15, which is another 2 points.  You might notice that there is a 5 that is face up on the deck.  This can also be paired with the King for 15 for another 2 points.  Finally, the three 5’s (2 in the hand and one on the deck) add up to 15.  This is an additional 2 points.When you have a pair of the same card, you earn 2 points.  The pair could be in your hand, or one of your cards could be paired with the card that is face up on the deck.  If you have 3-of-a-kind, that is worth 6 points.  In the picture above, there are two 5’s in the hand and one 5 face up on the deck.  Not only does that make 15, but it is also 3-of-a-kind which earns you 6 points.

A “flush” is when you have 4 or more of the same suit (clubs, spades, hearts, or diamonds).  If you had 4 hearts in your hand, you would earn 4 points.  If the card that is face up on the deck is also a heart, you would get 5 points.  The hand below shows 5 clubs so you would get 5 points.

A “run of 3” is when you have 3 cards in numerical order.  You could also have a run of 4 or 5 cards.  Let’s say you had a 3, 4, 5, and 6 in your hand.  You would have a “run of 4” which is 4 points.  If the card on the deck was a 2 or 7, you would have a run of 5.  The hand below shows a run of 5.

The pictures below show several cribbage hands.  See if you can add up the points correctly!  Leave a comment with the “hand #” and an explanation of the total points.  You can also post a question if you’re not sure.  Check back often to see if all the hands are correctly totaled.

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# #52: Super Egg

Numberphile is a YouTube channel that posts many videos about many different math concepts. The channel has numerous videos on many real life examples. It is a great channel to learn about concepts not necessarily taught in school. One video that the channel contains is about a super egg, or a superellipse.

How can you spend your Math Minutes this week?

• After watching the videos, click on this link and answer the questions.

Numberphile Video: http://youtu.be/GznQgTdEdI4

*Lesson inspired by Numberphile video about superellipses

# #50: Fibonacci Numbers

#### 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144

What do these numbers have in common? What pattern do you see? These numbers are a part of what is known as the fibonacci numbers. Fibonacci numbers are found by adding the two previous numbers. So the number after 144 would be 233.

How can you spend your Math Minutes this week?

• Get graph paper and make a spiral using a fibonacci sequence, read through the previous link for reference.
• These numbers can be found in nature. Can you think of other real life examples of fibonacci numbers?

*Inspired by a video by Vi Hart

# #49: Cool Jobs that Involve Math

##### Yep! That job requires math!

Tony DeRose is a 3D animator at Pixar and in his TED-Ed video,  he talks about how math plays an important role in his job.  Nafees Bin Zafar is also in the movie making business.  He is a visual effect expert who has helped create some of the most memorable smashes, crashes, and dashes on the movie screen.