Just Mrs. Jones: math

Showing posts with label math. Show all posts
Showing posts with label math. Show all posts

March Means (Basketball) Math!

Wednesday, March 1, 2017
I love running into former students and hearing what they remember about fourth grade.  More than once in the last couple of years I've had a student tell me, "I remember how you let us watch the ACC tournament in class." I'm not sure what that says about my academic rigor, but it definitely shows where one of my passions besides teaching lies: college basketball!


Growing up in North Carolina means you have a loyalty to a college basketball team.  It doesn't matter if anyone in your family ever went there or if you've ever even visited the campus.  You still cheer enthusiastically for one team and enthusiastically hate the other three.  I can remember crying at night growing up because I didn't want to go to school the next day when my team had lost.  My sister and I may have been known to throw away admissions packets from one particular college because we'd had rather died than attend there, even if a full scholarship had been offered.

One of my co-workers is not from around here and the first year we worked together I asked her what she was planning for ACC math the first week of March.  She gave me a completely blank look and said, "What are you talking about?" Ten years later and I still haven't fully convinced her this is an important, though unstated, objective in the fourth grade state math curriculum.  But I'm just going to keep on writing my lesson plans as if it counts.

Novel units are my thing but so is ACC basketball!  These are my ACC Math Task cards that I update annually with current ACC team and player statistics.  You can download a free sampler here containing four word problems featuring the North Carolina ACC teams.  The full product containing 60 word problems (four featuring each of 15 ACC teams), recording sheets and an answer key can be found here.  Most fourth grade math objectives are covered, but the word problems are appropriate for advanced third graders or for fifth grade review as well.


Whatever you do to celebrate the ACC tournament next week (March 7th-11th), remember that your students WILL remember... whether that's what you thought they'd remember or not.

Go Deacs!


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Cross-Multiplication is Not a Trick

Monday, February 6, 2017
A few times in my teaching career I've been advised against teaching cross-multiplication when comparing fractions.  The argument posed is, "It's a trick," and students need to understand the process, not just memorize a trick.

For all the arguments against Common Core (I personally love Common Core, but that's a topic for another post), the change in standards has shifted our focus from product to process in a way that was much needed.  We don't just do long division anymore; we do repeated subtraction and partial quotients.   We don't just do multi-digit multiplication anymore; we do partial products and use the distributive property to break apart the products.  And in my classroom, we don't just cross multiply anymore; we multiply each fraction by a whole number.


I agree that students shouldn't just learn a "trick" but cross-multiplication is not a trick.  It works because you're taking a shortcut for multiplying each fraction by a whole number fraction with a numerator and denominator that matches the denominator of the opposite fraction.  The numbers you write at the top when you "cross-multiply" are simply the numerators of the equivalent fractions that is produced in this process.  Once my students understand this, I don't mind if they just write the number at the top and "cross-multiply" the same way I don't mind if they take shortcuts in other math operations.

Today I worked with a student after school on comparing fractions. (That's the actual paper we used to work on.) While we were "cross-multiplying" he said, "No one's ever really explained that to me before." As a teacher, no one had ever explained it to me either; I just took the time to figure out why it works.  That's the thing about math-- there aren't really any "tricks."  Everything works for a reason.  Our job is to make sure they understand all those reasons, one by one.


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ACC Math Task Cards

Sunday, February 28, 2016

I love March…it’s my birthday, daylight savings time begins, spring break…and most importantly for us North Carolina folks, it’s March Madness time!

This year, it’s been more like all-year madness for me.  I’m teaching the AG 4th grade class for the first time and taking two online classes for AG certification each semester to knock it all out this year.  I’ve learned so much from the classes but they’ve taken nearly every moment of my free time.  Sadly, TPT and blogging have taken a backseat to grad schoolwork and regular schoolwork.  I’ve tried to squeeze in a little here and there and I’m counting down until May when I’ll have some free time again.

Last week, my Timehop reminded me that we had some days off school around this time last year for snow.  Then I suddenly had a flashback.  I had spent those snow days making ACC Math Task Cards for TPT and had promised my buyers they’d be updated annually by March 1st.  I’m going to be at the NCAGT conference Thursday and Friday so my weekend to-do list included sub plans in addition to mid-terms for my AG classes.  BUT I never make a promise I don’t try my very best to keep, so a few hours tonight were spent updating my ACC Math Task Cards.

For the next 24 hours, they’ll be FREE so grab them up while you can.  Tomorrow night (2/29) at 11 pm, they’ll go back to the regular price of $4 just in time for March to roll in.  Enjoy and send the link to a friend!







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