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Robert Kaplinsky @robertkaplinsky.com · 17h

If your high school students are working on adding vectors, try out this Open Middle problem from Bryan Anderson. www.openmiddle.com/adding-v...

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Robert Kaplinsky @robertkaplinsky.com · 21h

How many movies can you see in one day? This lesson is perfect for third and fourth graders who are working on operations with time. I've included four different movie schedule options that range from easy to very challenging.

robertkaplinsky.com/work/mo...

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Robert Kaplinsky @robertkaplinsky.com · 1d

What can the differences between programming a remote control and learning how to drive teach us about problem solving?

robertkaplinsky.com/is-prob...

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Robert Kaplinsky @robertkaplinsky.com · 2d

Here's a matrix multiplication problem from Bryan Anderson that will help you bring out their conceptual understanding. See hints and answers on Open Middle. www.openmiddle.com/matrix-m...

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Robert Kaplinsky @robertkaplinsky.com · 2d

If you also like a good prank, then you'll love this lesson on surface area. It uses the aluminum foil prank to figure out how much it would cost to cover a room of your choosing. It's a great way to build conceptual understanding using nets.

robertkaplinsky.com/work/fo...

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Reposted by Robert Kaplinsky

Melynee Naegele @mnmmath.bsky.social · 6d

🎲✨ NCTM Game Night 2025!✨🎲
Join us for math games, puzzles, raffle prizes & fellowship! Bring a friend & connect in a fun, relaxed setting.
📅 Wed Oct 15
🕕 8 PM
📍Omni Intl Ballroom E
🍸 Cash bar.
Play, laugh & celebrate math together! #MTBoS #ITeachMath #NCTMATL25! #GameNight #ElemMathChat

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Robert Kaplinsky @robertkaplinsky.com · 2d

Thank you!

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Robert Kaplinsky @robertkaplinsky.com · 4d

People who are going to Atlanta for NCSM/NCTM, is there that game night hang out on Wednesday night? If so, can anyone point me towards more information about it?

@tracyzager.bsky.social

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Robert Kaplinsky @robertkaplinsky.com · 4d

Algebra teachers, check out these three rational exponent problems from Bryan Anderson. See the hints and answers on Open Middle:
www.openmiddle.com/rational...
www.openmiddle.com/rational...
www.openmiddle.com/rational...

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Robert Kaplinsky @robertkaplinsky.com · 5d

Learn about the differences between open middle and open ended problems in this this short and sweet breakdown.

robertkaplinsky.com/the-dif...

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Robert Kaplinsky @robertkaplinsky.com · 5d

A homeowner beautifully tiled her floor with about 13,000 pennies. Everyone thought it was wonderful... but then people complained on social media about how she wasted $13,000! 🤦‍♂️

robertkaplinsky.com/work/mu...

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Robert Kaplinsky @robertkaplinsky.com · 6d

What if we had an "Ask The Audience" lifeline to help us make better choices in education? I wouldn't be easy, but it's possible.

robertkaplinsky.com/behavio...

Robert Kaplinsky @robertkaplinsky.com · 6d

You're probably familiar with students counting out loud as a class, but imagine what happens when the conversations when students start counting at 1 1/2 and increase by 2 1/4 each time. Read more about what happens from Sadie Estrella:
iamamathnerd.wordpress.com/...

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Robert Kaplinsky @robertkaplinsky.com · 6d

If you're a fan of Open Middle and have been looking for your next math PD book, then you should check out Open Middle Math: Problems That Unlock Student Thinking. It'll take you through the whole process so that you're ready to go.

link.robertkaplinsky.com/op...

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Robert Kaplinsky @robertkaplinsky.com · 7d

Are your students working on radical equations? This Open Middle problem from Jonathan Newman will challenge their understandings! www.openmiddle.com/radical-...

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Robert Kaplinsky @robertkaplinsky.com · 7d

Can your students figure out which Michaels coupon will save them the most money? Is it the 30% off their entire purchase or 40% off of one item?
robertkaplinsky.com/work/mi...

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Robert Kaplinsky @robertkaplinsky.com · 8d

Do you need to post content or language objectives for your math lessons? Download these ready-to-go objectives now!

robertkaplinsky.com/content...

Reposted by Robert Kaplinsky

Grassroots Workshops @grassrootsworkshops.com · 11d

Heard about Open Middle problems but not sure how to get started? This workshop will get you confident and ready to use them with your students.

Learn more about Robert Kaplinsky's @robertkaplinsky.com How To Use An Open Middle Problem online workshop at grassrootsworkshops.com/wor...

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Robert Kaplinsky @robertkaplinsky.com · 9d

How deeply do your students understand parallel and perpendicular lines if they can't create sets of points to define the lines? Try out these two Open Middle problems from Nanette Johnson:
www.openmiddle.com/perpendi...
www.openmiddle.com/parallel...

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Robert Kaplinsky @robertkaplinsky.com · 9d

This skytyping lesson gives a real world context for all four transformations: reflections, translations, rotations, and dilations and their implementation using algebraic notation.

robertkaplinsky.com/work/sk...

Robert Kaplinsky @robertkaplinsky.com · 11d

Are your students learning about parallel lines and transversals? Try out these two Open Middle problems from Shelli Foust:
www.openmiddle.com/parallel...
www.openmiddle.com/parallel...

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Robert Kaplinsky @robertkaplinsky.com · 12d

Ever felt like you were the only one to be confused, only to later learn that many felt the same way, but no one said anything because they also felt like they were the only one? Learn what you can do to prevent it happening with your students.

robertkaplinsky.com/behavio...

Robert Kaplinsky @robertkaplinsky.com · 12d

Most theme park rides have height restrictions. Sometimes you have to be taller, sometimes shorter, and sometimes in between two heights. These restrictions are a great way to introduce the idea of inequalities such as greater than and less than.

robertkaplinsky.com/work/ri...

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Robert Kaplinsky @robertkaplinsky.com · 13d

Here is my open letter to the writers of future math standards where I make the case for more practical standards.

robertkaplinsky.com/open-le...

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Robert Kaplinsky @robertkaplinsky.com · 13d

I love The Onion's parody of the often heard "When will I ever use this?" comment but applied to physical education: www.theonion.com/majority-o...

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