Notes:

"GeoGebra is a free software program that lets kids create mathematical constructions -- and models where they can drag objects and adjust parameters -- to explore algebra and geometry simultaneously (along with other math fields). It's browser-based and also has downloadable applets for computer and mobile devices. GeoGebra offers kids and teachers the option to use existing math explorations or build their own, and there are a lot of tools available to do this. The existing pool of explorations is vast, so it covers most high school Common Core math expectations, especially those involving graphing or geometry. Teachers can make their own interactive worksheets that include simulations, videos, text, multiple-choice questions, and more. Some of the preexisting worksheets are interactive, while others simply show a concept." - Common Sense Education

website: https://www.geogebra.org/

link to download/install: https://apps.apple.com/us/app/geogebra-graphing-calculator/id1146717204#?platform=ipad