Increases can increase? Learn what students think

by HthrLynnJInvestigating Students' Math ReasoningPosted on No Comments

Sea levels aren’t just rising. They’re rising FASTER. https://www.cnn.com/2018/02/12/world/sea-level-rise-accelerating/index.html Yet how do students come to make sense of variation in change? How do “increasing” increases become things for students? In a March 2018 episode of the Math Ed Podcast, I talked with Sam Otten (@ottensam) about an article I co-authored with Evan McClintock. I share …

Read more “Increases can increase? Learn what students think”

Why is it so hard for students to make sense of rate?

by hthrlynnjInvestigating Students' Math ReasoningPosted on 3 Comments

Earlier this year, I searched for some newspaper headlines that dealt with rates. Here are a few that I came across: “Colorado unemployment rate among 10 lowest in the country” “Unintended pregnancy rate in U.S. is high, but falling” “Oil ends sharply higher. Logs 10% weekly gain as output draws focus” Many of the headlines …

Read more “Why is it so hard for students to make sense of rate?”