Robert Kaplinsky
@robertkaplinsky
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Math educator. Love helping teachers. @openmiddle co-founder. #OpenMiddleBook author. #ObserveMe creator. @GrassrootsWS Pres. Lessons & ideas:
Long Beach, CA
Joined August 2012
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Pinned Tweet
I don't often talk about living in homeless shelters or a group home because they're not my favorite memories to relive. However I decided to present about it because knowing stories helps educators better empathize.
You can watch the presentation here:
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Visualization of why the sum of a polygon's exterior angles equals 360 degrees.
Source:
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I had no idea you could do this to take a dead whiteboard marker and give it life again!
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What a cute way to give students control over how they want to be welcomed!
#MTBoS
#iteachmath
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What a cute way to give students control over how they want to be welcomed!
#iteachmath
#MTBoS
Source:
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Check out this multiplication chart drawn to scale from
@the_chalkface
! This seems so intuitive. More info here:
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Counting the number of licks is all fun and games until...
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I love this context for introducing Least Common Multiple to students. How many hot dogs and buns should Steve Martin buy?
#iteachmath
#MTBoS
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I've got 70+ real world problem-based math lessons that you can download for free and use with your students.
#MTBoS
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This vid from
@gfletchy
makes me realize that I never REALLY understood division as a kid. I was just a good robot.
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This has been around a while but I love this visual representation of the Pythagorean Theorem that emphasizes the area (or volume) of the squares outside the triangle and not just the length of the triangle's sides.
#iteachmath
#MTBoS
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This video from
@gfletchy
makes me realize that I never REALLY understood division as a kid. I was just a good robot.
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Here's my 3 sentence blog post:
1) Word problems do not exist in real life outside of school.
2) We teach students strategies for solving word problems like Three reads and CUBES.
3) Students will never use strategies like Three reads or CUBES in real life outside of school.
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I'm so tired of how much time we spend teaching math that few will ever use during their entire life, just in case a small percentage of us might need it.
Like I've used almost nothing I learned in Geo, Alg 2, PreCalc, and Calc but I need statistics and other math all the time.
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I love this context for introducing Least Common Multiple to students. How many hot dogs and buns should he buy?
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This analogy is perfect.
@ValeeGrrl
Saying teachers work 8am to 3pm 10 months a year is like saying Tom Brady only works 13-14 Sunday afternoons a year.
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I love this context for introducing Least Common Multiple to students. How many hot dogs and buns should Steve Martin buy?
#iteachmath
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Have you seen from
@bstockus
? Same or Different? is a routine that provides students opportunities to construct arguments when comparing objects, such as numbers or shapes.
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This has been around a while but I love this visual representation of the Pythagorean Theorem that emphasizes the area (or volume) of the squares outside the triangle and not just the length of the triangle's sides.
#MTBoS
#iteachmath
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"My definition of a good teacher has since changed from 'one who explains things so well that students understand' to 'one who gets students to explain things so well that they can be understood.'" — Steven C. Reinhart from
#iteachmath
#MTBoS
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We can be sure that every high school math textbook's exponential lessons will all be about pandemics for the rest of our lifetimes.
Source:
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Are schools having conversations about how we will only be able to cover about 1/3 to 1/5 as much content online as we might in person (and proactively addressing it)? If everything takes 3 to 5 times as much time to teach online, then this is something we need to talk about.
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Could this be the future of how we teach perimeter, area, and volume?
Source:
#iteachmath
#MTBoS
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I'm a big fan of numberless word problems because they force students to think rather than mindlessly compute.
@bstockus
shares lots of free problems for elementary teachers here:
#iteachmath
#MTBoS
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I love this context for introducing Least Common Multiple to students. How many hot dogs and buns should Steve Martin buy?
#MTBoS
#iteachmath
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"The best thing parents can do is to teach their children to love challenges, be intrigued by mistakes, enjoy effort, and keep on learning."
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I've been a math educator since 2003 and Building Thinking Classrooms in Mathematics by
@pgliljedahl
has more potential to improve the way we teach mathematics than any other book I have ever read.
I wrote a blog post to share why we should all read it:
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I spent most of my high school years living in a group home. I usually try to avoid talking about it, but I realize that I have a perspective that might be helpful for other educators. So, here's what I wish teachers knew:
#iteachmath
#MTBoS
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I spent most of my high school years living in a group home. I usually try to avoid talking about it, but I realize that I have a perspective that might be helpful for other educators. So, here's what I wish teachers knew:
#iteachmath
#MTBoS
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Check out this multiplication chart drawn to scale from
@the_chalkface
! This seems so intuitive. More info here:
#MTBoS
#iteachmath
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I love this article from Steven C. Reinhart about teacher moves in the math classroom that help get kids doing more of the communicating (instead of the teacher).
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I wonder why we rarely hear about schools pushing students to accelerate through ELA. Schools proudly talk about a pathway to allow kids to take 3 years of math in 2 years... but rarely the same with ELA. How'd we got to a place where one option seems silly and the other great?
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Don't forget about the 100 free challenging tasks for secondary math teachers. Around 20 per grade level
#MTBoS
#iteachmath
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Here's my centering question for defeating impostor syndrome: "Will what I'm doing help another person?" If the answer's yes, then I tell my impostor syndrome to shut up because even if there are people who are better than me or know more, helping someone else still matters.
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I love how
@jamestanton
takes down five of the most common objections to using the area model to conceptually teach multiplication. Check out his 9 minute video where he helps make sense of the madness:
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I'm loving this fascinating blend between English and mathematics. Here are the results of how likely an event is based on when each of these words/phrases are used based on what 956 US adults said.
What do you notice? What do you wonder?
Source:
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I feel like I'm back in school doing a group project where others are not participating so we're all going to fail.
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I so love this quote from
@simonsinek
: "The role of a leader is not to come up with all the great ideas..."
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This video from
@gfletchy
makes me realize that I never REALLY understood division as a kid. I was just a good robot.
#MTBoS
#iteachmath
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Do you teach students about patterns or functions? If so, you'll love the 200+ patterns on from
@fawnpnguyen
. Enjoy!
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I've made
@openmiddle
problem matrices for 3rd grade to Algebra 2 to show how a single problem can replace an entire worksheet. This blog highlights the 8th grade
#DOK
matrix but has a button to download EVERY grade level right now.
#iteachmath
#MTBoS
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"A lifeguard's job is to prevent struggle but a swim instructor's job is to encourage struggle." -
@MikeFlynn55
. Should educators be more like lifeguards or swim instructors?
#CMCmath
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Check out from
@NatBanting
for fun images to get students reasoning about fractions.
#MTBoS
#iteachmath
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I just finished making Depth of Knowledge (DOK) matrices for 3rd grade through Algebra 2!!! So many new
@openmiddle
problems to share! 8 columns of problems for each grade level! Now I gotta work on putting them on my website and putting answers on .
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Third grade teachers! I've made
@openmiddle
Depth of Knowledge matrices to show how a single math problem can replace an entire worksheet in third grade. Download it now here:
#iteachmath
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I love how
@jamestanton
takes down five of the most common objections to using the area model to conceptually teach multiplication. Check out his 9 minute video where he helps make sense of the madness:
#iteachmath
#MTBoS
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If you're an elem teacher, you'll love this video from
@gfletchy
where he breaks down how students learn about + and -.
#iteachmath
#MTBoS
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I'm happy to share the cover of my upcoming book on
@openmiddle
problems! The forward's written by brilliant Open Middle co-founder
@Math_m_Addicts
.
@TracyZager
has been my patient and insightful editor with
@stenhousepub
. Should be out sometime in the fall.
#MTBoS
#ITeachMath
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Want a problem based lesson for every
#CCSS
standard from elementary through high school?
@geoffKrall
has it for you here:
#iteachmath
#MTBoS
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Teaching Pythagorean Theorem? Show students this clip from the Wizard of Oz and ask them to correct what the Scarecrow says.
#MTBoS
#iteachmath
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I love this context for introducing Least Common Multiple to students. How many hot dogs and buns should he buy?
#iteachmath
#MTBoS
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I've made
@openmiddle
problem matrices for 3rd grade to Algebra 2 to show how a single problem can replace an entire worksheet. This blog highlights the 6th grade
#DOK
matrix but has a button to download EVERY grade level right now.
#iteachmath
#MTBoS
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Today I learned that there's a pre-pre-SAT called the PSAT 8/9.
So you're telling me that kids struggled with the SAT so they created the pre-SAT. Then they still struggled with the pre-SAT and so now we have the pre-pre-SAT for 8th and 9th graders?!
This is ridiculous.
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Random vent: I am not a fan of the argument that b/c students will be lectured to in college, we should prepare them by lecturing in HS & MS
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I love this context for introducing Least Common Multiple to students. How many hot dogs and buns should he buy?
#MTBoS
#iteachmath
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Don't forget about the 100 free challenging tasks for secondary math teachers. Around 20 per grade level
#iteachmath
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I'm two chapters into
@pgliljedahl
's
#thinkingclassroom
book and I'm very impressed. He's broken down everything that happens in math classes into 14 categories and then rigorously tested out strategies that may improve our results.
It's both fascinating and very readable.
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I love this context for introducing Least Common Multiple to students. How many hot dogs and buns should Steve Martin buy?
#MTBoS
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A big problem in education is that teachers keep their insecurities to themselves for fear of being judged. I wish it wasn't that way. So, I wrote a list of my 10 biggest educator insecurities and hope it'll make it easier to talk about.
#MTBoS
#iteachmath
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Eighth grade math teachers! I've made
@openmiddle
Depth of Knowledge matrices to show how a single problem can replace an entire worksheet in eighth grade math. Download it now here:
#MTBoS
#iteachmath
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I had never heard of either of these methods for finding the middle of a flat object. What do you notice? What do you wonder?
Source:
@ThisOldHouse
#MTBoS
#ITeachMath
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Seventh grade math teachers! I've made
@openmiddle
Depth of Knowledge matrices to show how a single problem can replace an entire worksheet in seventh grade math. Download it now here:
#iteachmath
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Want your students to develop conceptual understanding of equality and solving equations? Check out these fun and ADDICTING puzzles:
#iteachmath
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Check out this multiplication chart drawn to scale from
@the_chalkface
! This seems so intuitive. More info here:
#iteachmath
#MTBoS
7
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404
Have you seen from
@bstockus
? Same or Different? is a routine that provides students opportunities to construct arguments when comparing objects, such as numbers or shapes.
#iteachmath
#MTBoS
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I've got 70+ real world problem-based math lessons that you can download for free and use with your students.
7
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Fourth grade teachers! I've made
@openmiddle
Depth of Knowledge matrices to show how a single math problem can replace an entire worksheet in fourth grade. Download it now here:
#iteachmath
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Want your students to develop conceptual understanding of equality and solving equations? Check out these fun and ADDICTING puzzles:
#iteachmath
#MTBoS
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If you're an
@NCTM
member looking for problems of the week, then you'll love the ones created by The Math Forum. Their problems cover Kindergarten to Calculus.
#iteachmath
#MTBoS
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"Somehow it's O.K. for people to chuckle about not being good at math. Yet if I said, 'I never learned to read,' they'd say I was an illiterate dolt." —
@NeilTyson
#iteachmath
#MTBoS
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Check out this multiplication chart drawn to scale from
@the_chalkface
! This seems so intuitive. More info here:
#iteachmath
10
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390
Teaching Pythagorean Theorem? Show students this clip from the Wizard of Oz and ask them to correct what the Scarecrow says.
#iteachmath
#MTBoS
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Looking for more real world problem-based lessons? Have you checked out
@YummyMath
? Lots of probs for 3rd to high school.
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Fifth grade teachers! I've made
@openmiddle
Depth of Knowledge matrices to show how a single math problem can replace an entire worksheet in fifth grade. Download it now here:
#MTBoS
#iteachmath
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Would you prefer to browse my lessons in a spreadsheet? Check out to view them with the concept/skill and standards.
#iteachmath
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I don't know if I'm proud or upset. My son made a long video of him looking at the screen, turned it into a gif, and is using that as his virtual background. So now it legit looks like he's paying attention and interacting even if he's not in the room.
#pandemicparentingdrama
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A big problem in education is that teachers keep their insecurities to themselves for fear of being judged. I wish it wasn't that way. So, I wrote a list of my 10 biggest educator insecurities and hope it'll make it easier to talk about.
#iteachmath
#MTBoS
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Would you prefer to browse my lessons in a spreadsheet? Check out to view them with the concept/skill and standards.
#MTBoS
#iteachmath
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I love this poster on developing a growth mindset community from
@joboaler
,
@FeldsteinShelah
, and
@mathschristine
.
#MTBoS
#iteachmath
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I love this poster on developing a growth mindset community from
@joboaler
,
@FeldsteinShelah
, and
@mathschristine
.
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Do you teach students about patterns or functions? If so, you'll love the 200+ patterns on from
@fawnpnguyen
. Enjoy!
#iteachmath
#MTBoS
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Has anyone ever used the formula for the volume of a square pyramid in real life? The percentage of the population that has actually used that HAS to be less than 0.000001%... and that might be waaaay too high of an estimate. There are so many standards I wish I could get rid of.
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"My definition of a good teacher has since changed from 'one who explains things so well that students understand' to 'one who gets students to explain things so well that they can be understood.'" — Steven C. Reinhart from
#MTBoS
#iteachmath
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I love these great questions from
@TracyZager
that encourage math students to use their intuition.
#becomingmath
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Do you teach students about patterns or functions? If so, you'll love the 400+ patterns on from
@fawnpnguyen
. Enjoy!
#MTBoS
#iteachmath
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Just finished teaching my first virtual lesson to 8th/9th grade students. So very humbling. In some ways I haven't felt this awkward since my first years as a teacher. I learned a lot but now I'm clearer about what needs to be better.
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I so love this quote from
@simonsinek
: "The role of a leader is not to come up with all the great ideas. The role of a leader is to create an environment in which great ideas can happen."
#iteachmath
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I got this message today from someone who worked at the group home I lived at for over 3 years. She must have held onto it for almost 30 years. It really takes me back.
Let's love up our students. Many are dealing with challenges & could use our support.
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I've got 70+ real world problem-based math lessons that you can download for free and use with your students.
#iteachmath
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What do you think of this balance? I've never seen one like it.
Seems like there are others on Amazon:
Source:
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Have you explored Same But Different Math from
@LooneyMath
? It's a math routine designed to have students consider the relationship between objects. She's got examples from elementary school through high school.
#iteachmath
#MTBoS
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