This Monday Americans will celebrate Memorial Day. Who are we honoring? How did the holiday come about? Is Memorial Day always on May 30th? Students learn a little about the history of the holiday, analyze the possibilities for when it is…

# Algebra

These posts help students see patterns and relationships.

# How long until they collide?

Show the beginning of the video. Stop the video at about 39 seconds. Take guesses from students. Have kids work individually on the problem for a few minutes or more, followed by partner work. You might project the image below for…

# Who had the greatest NBA season ever?

# Should I replace my toilets?

I’m trying to be more savy about wasting our resources. I have really old fashioned toilets and I’m trying to figure out if I should invest in saving water. Can you help me? The activity: PottyTalk.pdf CCSS: 8.F.3, 8.F.4, 8.F.5, HSF.IF.B.4, HSF.IF.B.6, HSF.IF.C.7, HSF.IF.C.9, HSF.LE.A.2, HSF.LE.B.5

# Powerball jackpot continues to rise in value

One winner last night in New Jersey! Now the jackpot is back to ONLY 40 million. The Saturday night Powerball drawing is expected to have a winning Jackpot prize of $415,000,000. Examine compound probability to decide if playing Powerball is worth…

# Double Discount

Wow, check out this sale! I’m gonna be able to get this great hoodie so cheap! If I use the promo code what will be the total percent off? The activity: DoublePercentOff.pdf CCSS: 6RP.3, 7.RP.3, HSF.IF.C.8b, HSF.LE.A.1c

# Will college be affordable?

Whether you or one of your siblings is going off to college next fall, it is useful to know how much colleges cost. Not going to college this fall? No worries, we can use the information on college costs in…

# Where do those convention delegate numbers come from?

We hear nightly about who won delegates in state elections. But different states have different numbers of delegates. How is that figured out? Is it fair? The activity: Delegates.pdf Here’s a calendar of the nomination process: ElectionCalendar.pdf

# The Boston Marathon

Monday, April 18, Patriot’s Day, is the next running of the Boston Marathon. What do you know about marathons? What do you know about the Boston Marathon? How long do you think the marathon is? Make your best guess. How…

# Figuring planting dates

It’s time to get ready to plant my garden again. But here in Boston we have to start our seeds indoors to give them a head start before we can put plants outside. How should I figure out when to plant my…

# Which is the best deal?

How do you calculate and justify which deal is a better savings? By dollars saved? By percent saved? By some other measure? The activity: WhichDealOffersMostValue.pdf CCSS: 4.OA, 4.NBT, 4.MD.A, 5.NBT, 6.RP, 6.EE, 7.RP, 7.EE.A

# April Fool’s Day perplexors

We have two classic puzzles for your April 1st class starters. PerplexingOne.pdf PerplexingTwo.pdf CCSS: MP.1, MP3,4.OA, 5.G, 8.EE, 8.SP For members we have solutions. PerplexingOne-solution.pdf PerplexingTwo-solution.pdf Or you might baffle and amaze your students with our Ghost Whisperer lesson.…

# How much do the tickets cost?

Ooops! I was supposed to buy 4 adult and 2 children tickets, but I accidentally entered four children and two adults … 🙂 Can you figure out how much a child’s ticket and an adult ticket actually cost?

# The perfect bracket

Sunday night, March 13th, is Selection Sunday. Now the March Madness bracket predictions can begin. What are your chances of picking every game? How does the change from 64 to 65 to now, 68 teams in the field complicate things? How…

# Pi Day

March 14th is almost here ! Celebrate π in your school and in your math class with activities that demonstrate how π was derived; visually show why π makes sense; show a surprising place where π is used; increase students ability to…