All posts by Mark Trushkowsky

About Mark Trushkowsky

Mark enjoys doing math problems that take weeks, family sing-a-longs and reading late into the night. At 16, he believed the next revolution would be waged through poetry. Now he believes it is adult basic education. But he still likes poetry. Mark has worked in adult literacy and HSE since 2001. He is a founding member of the NYC Community of Adult Math Instructors (CAMI). He was born and raised in Brooklyn. He currently lives happily ever after in Minnesota with his partner Sarah, their daughter Liv, 4 chickens and a dog named French Fry. Follow him on Twitter (@mtrushkowsky)

Number Sense: Helping Adult Numeracy Students Close the Gap

“About 1 in 5 adults in the U.S. lacks the math competence expected of a middle-schooler, meaning they have trouble with those ordinary tasks [calculating a tip, doing fractions to double a recipe, know how much change to expect from a cashier] and aren’t qualified for many of today’s jobs.” 

I came across this quote in an article called “Early Number Sense Plays a Role in Later Math Skills“. The author attempts to trace this statistic back to a root cause and comes up with a University of Missouri study done with 7th graders who were given a test to assess a variety of math skills needed to function in the world as an adult. They found that the students who were behind on the seventh-grade test were the same students who had the least number sense or fluency in mathematics in the first grade.

Continue reading Number Sense: Helping Adult Numeracy Students Close the Gap

Learning through classification: What makes this number (or shape or graph) different from the others?

Which One Doesn’t Belong? (WODB) is a website with a very simple concept. It is “dedicated to providing thought-provoking puzzles for math teachers and students alike”. Basically, it presents four of something and you have to come up with a reason why each one of the four things doesn’t belong. But it is far more than a collection of brain teasers.

One way we can help students develop different ways of thinking in math is to have them work on activities where they have to classify mathematical objects. Continue reading Learning through classification: What makes this number (or shape or graph) different from the others?

Mistakes in Math: Expected, Respected and Inspected

Years ago, when beginning some work on percentage with some HSE students (they were called GED students at the time), I posed the following problem:

Veronica’s math class has 25 students. If 7 of them identify as men, what percent of the class does not identify as men?

I used it as a quick assessment to see what kind of understanding I could build off and what kind of misconceptions I could draw out. Continue reading Mistakes in Math: Expected, Respected and Inspected

Inspiring Student Curiosity (or What’s “Real” about Real-world Math?)

“So I’m there on the beach with my friend Ben when we notice a taco cart up the road. Ben wants to walk straight over, but I’m thinking we walk a lot slower in the sand than we do on the street. So I say we walk straight to the street and then down the street to the cart. So we went our separate ways…” Thus begins the first Three-Act math task I ever experienced, courtesy of Dan Meyer.

Continue reading Inspiring Student Curiosity (or What’s “Real” about Real-world Math?)

Mental Math to Increase Student Computational Fluency and Number Sense

A Number Talk is a brief activity teachers can do with students to help build their computational fluency, number sense and their mathematical reasoning. They don’t need to be longer than 5-15 minutes and they can be done with students at any level.

Continue reading Mental Math to Increase Student Computational Fluency and Number Sense