Here's an order of operations and absolute value problem from Michael J Wiernicki for your seventh graders to try. Hints and answers on Open Middle: openmiddle.com/rational-numbe…

Has anyone found a way to look at the NCTM annual conference program where you can see all the presenters without having to click on every single session? That takes FOREVER. It's a bummer that there's no PDF program that I can find. CC: Kevin Dykema

Sometimes people look at Open Middle problems and dismiss them as just brainteasers that are not worth using. Here's my take: robertkaplinsky.com/higher-depth-k…

Want ideas and ready-to-go math problems you can implement in your classroom? Sign up to have them emailed to you at bitly.com/rkupdates #MTBoS #iteachmath

I once saved a slide deck or pdf full of famous mathematicians that someone shared either here or on Facebook. Now I can't find it. Help!? #mtbos Robert Kaplinsky Sunil Singh Chelsea McClellan #iteachmath #elemmathchat #mathed

#whyopenmiddle

Are you teaching LCM? This lesson that uses buying hot dogs and buns as a context for making sense of the mathematics. robertkaplinsky.com/work/how-many-…

This subtracting fractions Open Middle problem starts off easy enough, but finding the smallest or largest difference can be really challenging! openmiddle.com/subtracting-fr…

One of my favorite lessons and Steve Martin and Martin Short is still well-known to 6th graders. They LOVE him! #mtbos #iteachmath

If you've also used worksheets to teach your students math, then I've recorded a webinar you'll want to check out. It's called Why We Should Reconsider Using Worksheets (And What We Should Be Doing Instead), with K-5 & 6-12 versions. robertkaplinsky.com/worksheets #MTBoS #pd

This video from Graham Fletcher makes me realize that I never REALLY understood division as a kid. I was just a good robot. gfletchy.com/2016/01/31/the… #iteachmath

Here are three reasons I think all (math) educators should use social media to improve professionally. robertkaplinsky.com/3-reasons-math…

Is it cheaper to pay for season passes monthly or annually? This lesson will give you a context for decimal operations. robertkaplinsky.com/work/monthly-o…

I co-founded a math teacher specialist network with hundreds of members that's met bi-monthly since 2013. Here's what we did and how you can make your own local network. robertkaplinsky.com/category/math-…

This Open Middle problem from Daniel Luevanos on simplifying exponential expressions is so challenging that we don't even know if we've found the best answer! openmiddle.com/simplifying-ex…

It's September, and I'm getting pumped for conference week! Please join the fun at Game Night, held on Wednesday night after the opening NCTM keynote. #NCTMGameNight

Looking for a real world context for multiplying and dividing decimals? Check out my problem-based lesson called How Much Money Do You Earn For 1,000,000 Streams On Spotify? robertkaplinsky.com/work/how-much-…

Here's a simple but challenging Open Middle problem to bring out students misunderstandings about inequalities: openmiddle.com/creating-inequ…

If you live anywhere near Macon, GA, I'm going to be doing two days of professional development. Register here: September 16th for Grades 3 to 7: reg.learningstream.com/reg/event_page… September 17th for Grades 8 to 12: reg.learningstream.com/reg/event_page…

Ever been frustrated by professional development that's so theoretical that you have no idea how to actually implement it with your students? Here's what we should be doing instead. robertkaplinsky.com/common-profess…