![]() so they can automatically "feel" that -10 is lower than -1. I modified it for students who need fluency in understanding negative numbers. Where students place assorted numbers in scientific notation on anumber line. While there are some tutorials it's not really easy to figure things out (it was weeks before I found out that I could click on any app in the right place and find the "construction protocol," which lists the steps the author did to create the app). With my finite time and so many pots on the fire, I decided in January that I'd get to know Geogebra, primarily because it is more officially and formally OER pretty much everything is CC-BY. There are two sites where people can find, use, and make and share visual, interactive math activities: Geogebra and Desmos.
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