## Pages

### GeoGebra

The Official Sites
First,  Geogebra.org

• Click on Materials to browse GeoGebraTube to see what people have made already. These sketches can be run in a browser on desktop or mobile. The uploaded materials are searchable, like YouTube. Worksheets can be downloaded (everything is CC3.0), liked, or organized into GeoGebraBooks.
• Click on Start GeoGebra to open Web GeoGebra in your browser, which has most of the functionality of the full program.
The awesome and searchable GeoGebraTube is what has made this program flat out amazing. A large, rapidly going archive of shared materials with creative commons licensing that can be used in browser or downloaded and customized. You can get a free account, favorite, like and comment on sketches and build your own collection that's then available in teacher or student view. Here's a few sketches on which to start.

The Help tab takes you to the wiki, which has a Manual, the Forum (I've never waited more than a day for help), Tutorials, and Tool Tips and Tricks. Here's a Quick Start guide (pdf).

For Twitter Math Camp 2015 Jed, Audrey and I pulled together a good list (Gdoc) of resources and tasks for GGB users at multiple levels.

On Twitter you can include #ggbchat or @geogebra to get help. But a lot of people in the #MTBoS can help or connect you with someone who can. The Geogebra Facebook page is a good way to keep up on developments, meetings, etc. There is also an active GeoGebra community on Google Plus.  There is an online, peer-reviewed journal, North American GeoGebra Journal. I maintain a twitter list of excellent GeoGebra folk, also.

GeoGebra Resources by other people

My GeoGebra Work
All Blog Posts, usually discuss use with students or GeoGebra methods.
All Tumblr Posts, usually just the sketch with a picture & links, the bulk of my GeoGebra sketches.
All GeoGebraTube uploads (my profile) as well as some collections of others' sketches.

 Number Percent Game - taking percents of different amounts in a race game. Percent Game Remixing - building off others' cool stuff Percent visualization Fraction Multiplication - area model. Fraction Visualization - comparison model instead of part-whole. Modeling: Scale drawing - of my basement! Revolving door - data to sketch Ferris Wheel - two graphic windows Algebra: Variable - mine plus outside links  Graph and table - representation work, demo of spreadsheet  Linear system - phone charging  Linear system - candle burning Linear functions - temperature conversion  Pyramid Pattern Interesting pattern of cubes Quadratic functions - guess signs of coefficients from graph, vertex & standard forms Vertex of a Parabola - investigation from standard form Quadratic modeling - Bouncing Ball simulation, think aloud about making the sketch Quadratic GeoGebra - blogpost about using several of these sketches in class. Graph Transformations - mine plus outside links Target Practice - a game for mastering and understanding quadratic equation forms, plus a cubic version. Trig Visualizing - Geogebra sketches, class activity, and my first WCYDWT attempt.  Basic Trig Diagram - based on David Joyce's great image Trigonometric Modeling - Ferris wheel Catenary vs Parabola - plus bridge fitting Powers of 2 - graph with self-adjusting scale GeoGebra Features/Techniques Animation - my techniques for multiple moving parts. Animation - with some related scripting commands Sequence command - for a mathart project User created tools - for a mathart project Calculus: 2nd Fundamental Theorem - integral definition of a function. Derivative Game - you control velocity; can you get where you're going? Center of Mass - really like the flexibility of the sketch. Helps in making mobiles. Archimedean Spiral for a game Logarithmic Spiral a la Vi Hart Bicorne Graph Bezier Curves Geometry: The Clown - an elementary geometry activity Puzzles: Triangle Puzzle -tangramish puzzle with the 7 triangle types, Pythagorean Puzzle 8th grade area problems Nets - I hate the lack of variety among solids models, so these can be weird: prisms and pyramids Surface area and volume - chocolate bar Paper Rolling - cylinder volume   Area bisection of triangles - neat result Triangles: by side length, Triangle Angle Sum and Pythagorean Proof  Pythagorean tessellation that doubles as a proof Quadrilaterals Quadrilateral Diagnosis - a characteristics discovering sketch  Circular areas - Weird wave problem   Circle geometry - intersections Similarity - includes a faux 3-D similarity sketch. Tessellations - oh, how I love these! Introduction, Kites, Pentagon tiling (links at the end of the post), Penrose Tilings, Motions: Introduction, Motion Composition (getting particularly at relation between other motions to reflections), and Glide Reflections Triangle Vertex Reflections - nice conjecturing context  Van Schooten ellipse Apollonius Problem (circles tangent to 3 things) - special case Pitot Theorem  Other: Pentagram of Venus Fibonacci Spirals Euler Spirals one and two Spirograph - recreating a childhood toy that draws hypertrochoids. Carvao Quadrilateral (math art) Brownie Math - a perimeter question from Geof Krall Intro to statistics in GeoGebra Random Ant Walk - fun problem, fun to make  Simulation of a digger from construction. GeoGebra 4 Teachers and More GeoGebra 4 Teachers - about running GGB workshops.  My favorite GeoGebraTube authors Teacher recommended sketches from GeoGebraTube
GeoGebraTube Profiles to browse
Request for Requests: I love making these sketches. If you have something you want made for your class, I would be very happy to take a crack at it. Just email me or tweet and we'll give it a go.  In particular, I'm looking for algebraic ideas/needs for visualization.

Anything is fair game!