Desmos and GeoGebra: Great for Teachers and Students
Desmos and GeoGebra: Great for Teachers and Students
Desmos is a free online graphing calculator (and it operates like a graphing calculator - without
the menus!!)
GeoGebra is a free program that can be used as a graphing
calculator, dynamic geometry package, or CAS (Computer
Algebra System, including Calculus).
Advantages of Both Desmos and GeoGebra
? Free
? Syntax is like we write on paper. For example, you type:
o f(x) = 2x + 3
o f(4)
o Can graph inequalities (in two variables). y >= 2x +5
? Very intuitive ¨C easy to use
? Shift-mouse drag to move axes
? Mouse roller ball to zoom in/out.
? You can graph relations (e.g., ? 2 + ? 2 = 3). Big step up from just Y=.
? You can use colors.
? Can save your work (files).
Desmos
GeoGebra
Biggest Strengths:
? Cross platform. Runs on anything. Runs
in browser.
? They are working hard to make it
educational.
? Very intuitive.
Dynamic, using sliders (e.g., coefficients)
(created by Desmos)
Biggest Strengths:
? High quality, full-featured, 21st Century
mathematical software.
? Powerful combination of geometry and
algebra (up to calculus).
? Ease of use.
Dynamic, click and drag. (or sliders)
(Sharing area)
Everything is treated geometrically and
algebraically. (circles being an example)
Everything is automatically measured.
Tips for Desmos:
? Use the wrench. Use Projector Mode (to project in class).
? Follow the iPad rule-of-thumb: Touch it! (for example, to see the maximum point)
? Colors are easy to change. With systems this is nice.
Tips for GeoGebra:
? After you click a tool (at the top), hover over the tool to see how to use it. This may be the thing I
like about GeoGebra the most!
? The Selection Tool (arrow). Get in the habit of going back to it (one way is to hit ESC).
? Use the command line.
o When you start typing, it will tell you the syntax. ?
? Right-Click Object Properties is used often. Many nice properties
? It will run in the browser, or you can download it and run it from your computer (sans internet). I
prefer the latter.
? Edit|Graphics View to Clipboard is great for creating graphics for worksheets and tests.
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