Skip to main content

Concrete Math

Division: Cut an actual pie.
Square: lay out tiles/blocks/whatever.
Cube: build a 3x3x3 cube using cube-shaped items (like blocks or six-sided die).

The school treated math in an abstract manner. Whenever my son with dyscalculia got very lost, I made it as concrete, hands on, real world and literal as possible.

By literal, I mean I tried to show him that terms like "cubed" or "squared" were literal descriptors of physical phenomenon, not just made up keywords.

If you draw up an old-fashioned times table, you can show that multiplication uses the word "times" because you have this number that many times and show why it makes absolutely no difference what order the numbers are listed for multiplication. You can do the same thing with coins or piles of anything (sticks, pebbles, whatever). Five piles of six items or six piles of five items both add up to thirty.

I helped my math-challenged son get over his baggage in part by teaching him "Adding is qick and easy counting. Multiplying is just quick and easy adding. If you make 10 piles of 30, you've got 300 items and don't have to spend forever manually counting them and hoping you don't get confused and lose count along the way. Exponents are just easy multiplication. Math is your friend and makes those tasks easy."

So you can show that for addition and multiplication, the written number order does not matter because in real life the order doesn't matter. But for subtraction and division, it does matter how you write it because the written math represents something real and it matters in reality.

When my son found it confusing and nonsensical that a bigger number on the bottom of a fraction makes a smaller number, I pulled a pie out of the refrigerator and cut the pie into two pieces and we talked about how you write that (1/2) and then I cut it again making it 4 pieces (1/4) and then I cut it again making it 8 pieces (1/8) so he could see that dividing one whole pie into halves, quarters and eighths made for steadily smaller pieces.

For basic math, many of the words used are rooted in real world observations. "Square" numbers form a physical square on the times tables. "Cubing" a number can build an actual cube.

Popular posts from this blog

The Hand Licking Incident

When my oldest son was seven and in second grade, we were living in Kansas. Some time after the school year started, he began licking his hands. He soon was doing so all day, every day. His teacher wanted it to stop. So did his dad, my husband. I was a young homemaker, financially dependent on my husband, and I was feeling enormously pressured by both of these people. I also felt they both had real careers and didn't genuinely respect me. They both felt it was my job and mine alone to somehow make my son stop licking his hands entirely. I caved to the pressure. I tried telling my child to stop. I tried spanking him. I tried putting unpleasant spices on his hands to deter him. I tried grilling him about why he was doing this so I could find some solution. He couldn't explain it and the terror in his eyes was disturbing. None of it made any difference whatsoever. He continued to lick his hands all day, every day. He just tried to hide it a little better. Meanwhile, our rela...

Crazy Conclusions in Early Childhood

From my last post on this site: One recurring theme: Bright kids of a certain age are just smart enough to jump to crazy conclusions rooted in lots of knowledge for their age but little real world experience. This seems common in the roughly toddler to preschool age range. I can readily think of a few examples of this from my oldest son's early years. The easiest one to tell is his ladybug freak out. He was about four years old and we were living in a third-floor walk-up in Germany. There were some really tall trees outside his bedroom window and one day there was a small ladybug invasion in his bedroom. He was inexplicably just terrified of the handful of yellow-and-black ladybugs on his bedroom wall. I actually laughed out loud because it seemed comical, but then I took him out of the room and closed the door and made sure he was protected from being around these bugs even though they were harmless. I kept the door shut to his room for a few days and he slept in my room u...

Letting him shine

Save the Last Dance, audition scene I kind of hate the above scene. It's sort of cringe and probably highly unrealistic but movies do a lot of things to try to communicate plot points to the audience that a more realistic scene wouldn't communicate. The backstory is her mother died in a car wreck while she was at an audition if I recall correctly and she ends up moving in with her loser father, going from a big house in a very White suburb to a cramped inner city apartment and predominantly Black high school. She stops dancing, feeling like it's her fault her mother died. She gets involved with the boy in the above scene and on the phone a friend from the old neighborhood expresses surprise that there are any White boys to date at her new school and classmates give her a hard time about "a white girl taking one of the few good men we got." So there's a lot of social baggage here and he encourages her to resume dancing, helps her learn new moves from his inner ...