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...

This lesson will help students evaluate which factors affect profitability when making a lemonade stand. Can they earn enough money to make it worth the their time and effort? robertkaplinsky.com/work/le...

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

Does understanding the Math Practices seem impossible? I think so and I rewrote them in an attempt to make them readable. In this blog post I share my revised version of MP 7 as well as a link to download all 8 MPs in English or Spanish as a printable PDF. robertkaplinsky.com/making-...

How can we figure out if we have enough paint for a handball wall? Use this problem with your students as a context for area. robertkaplinsky.com/work/do...

Does understanding the Math Practices seem impossible? I think so and I rewrote them in an attempt to make them readable. In this blog post I share my revised version of MP 1 as well as a link to download all 8 MPs in English or Spanish as a printable PDF. robertkaplinsky.com/making-...

What do you get when you mix Guess Who and math? You get Polygraph to help students develop need for precise vocab. classroom.amplify.com/searc...

Check out the professional development options on Grassroots Workshops (@grassrootsworkshops.com‬). There are flexible online workshops on topics including mathematics, social justice, teaching online, coding, English, wellness, and science. grassrootsworkshops.com/

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...

As a young math geek in high school, I figured out the best way to win the grand prize at Chuck E. Cheese's when playing Skee Ball. Use this lesson to help elementary students decompose numbers. Or secondary students can use systems of equations. robertkaplinsky.com/work/sk...

Does understanding the Math Practices seem impossible? I think so and I rewrote them in an attempt to make them readable. In this blog post I share my revised version of MP 5 as well as a link to download all 8 MPs in English or Spanish. robertkaplinsky.com/making-...

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...

Where else do you get to see a real-life example of "long-run" probability play out in 32 seconds? This poker-based lesson will help students discover the difference between theoretical and experimental probability. robertkaplinsky.com/work/vi...

Knowing when to take medicine two or three times a day is easy. It's much more challenging when it's five times a day! This lesson seems deceptively easy at first, but it's more challenging than students expect and really gets them thinking. robertkaplinsky.com/work/me...

Does understanding the Math Practices seem impossible? I think so and I rewrote them in an attempt to make them readable. In this blog post I share my revised version of MP 6 as well as a link to download all 8 MPs in English or Spanish. robertkaplinsky.com/making-...

I had never truly understood the difference between a guess and an estimate until Andrew Stadel broke it down using the context of a ketchup bottle. SPOILER: clear bottles make a difference mr-stadel.blogspot.com/2015...

If you provide online professional development, you should check out my webinar called "Six Counterintuitive Lessons Learned About Online Workshops". For example, should they be more like Netflix or traditional TV? Watch here: https://info.robertkaplinsky.com/counterintuitive/

Want to challenge your Geometry students to find the area of triangles? Try out this Open Middle problem from Dan Wulf. www.openmiddle.com/area-of-...

These packages of chips are missing the quantities on them. Can students find a fair way to determine what they should be? robertkaplinsky.com/work/ho...

In 2001, Taco Bell offered a free taco to everyone in the US if the Mir space station crashed into a sign they placed in the ocean. Math modeling was used to figure out how much they had to pay if it actually hit the target. Read more: robertkaplinsky.com/math-mo...

Here's a challenging Open Middle problem to help students develop conceptual understanding of quadratics in standard form: www.openmiddle.com/maximum-...

How tall is Mini-Me? Is he really 1/8 Dr. Evil's size? This lesson uses Dr. Evil and Mini-Me to help students build deeper understanding of scale as well as fraction and decimal operations. robertkaplinsky.com/work/mi...

If your Geometry students are working on the midpoint formula, try out this Open Middle problem from Dane Ehlert with them. www.openmiddle.com/midpoint...

Have you ever noticed that you can accept tough feedback from one person, but if another person gave you the EXACT SAME tough feedback, it would make you feel judged or criticized? Here's my secret for giving feedback others want to hear: robertkaplinsky.com/my-secr...

This lesson uses the Coinstar change counting machine as a context for decimal operations. Show elementary students the video to build context and have them figure out how much the coins are worth. robertkaplinsky.com/work/ho...

Do we really know our content standards? Or maybe we're just teaching what's in our textbooks? What if we're misinterpreting them or teaching standards that are not from our grade level? This happened to me for 4 years! Read more: robertkaplinsky.com/do-we-r...

Here's another great resource from Steve Wyborney. Imagine the conversations you can have when you ask students how much area is covered by tile? How many ways might students figure it out? stevewyborney.com/2017/01/t...

If you're a current or aspiring educational consultant that trains other educators and you're looking for a community that gets what you're going through, you should join the over one thousand consultants in our Facebook group here: https://www.facebook.com/groups/edconsultantslab

Are your students working on parallel and perpendicular lines? Try out these two Open Middle problems from Bryan Anderson: www.openmiddle.com/equation... www.openmiddle.com/equation...

In 2010, an enormous sinkhole suddenly appeared in the middle of a Guatemalan neighborhood and swallowed a three-story building above it. How much material will they need to fill the sinkhole? robertkaplinsky.com/work/si...