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Registration URL: https://attendee.gotowebinar.com/register/4710940484052437591
Webinar ID: 694-342-131

Most of us spend time helping students master significant figures when they calculate answers. It’s a key part of AP Chemistry, it’s expected in college chemistry, and with some practice, students usually get pretty good at it! But how many of them really understand why we bother with all that attention to error and uncertainty in the first place? How many could spot a situation where a graduated cylinder or balance just isn’t precise enough for what they’re trying to measure?

In this webinar, we’ll explore a lesson design that flips the usual order—students first experience why significant figures matter before learning the formal “rules.” Using a density lab (a favorite at the start of the year), we’ll see how to set up experiments that naturally bring measurement error to the surface. You’ll get ideas for collecting class data, guiding meaningful discussions, and helping students connect their own results to the concept of uncertainty.

We’ll also look at a few of my early missteps—moments that caused more confusion than clarity—and how to turn those into teachable moments instead. You’ll leave with practical strategies and a ready-to-use activity that helps students understand not just how to use significant figures, but why they matter.

Presenter: Zach Jones, Chemistry and AP Chemistry Teacher, Legacy High School, Broomfield, CO
Date: Tuesday, January 20th, 2026 at 7:00 PM Eastern time