Oakland A's Roster Eras
An interactive history of Oakland Athletics roster eras from 1968 through 2024, tracing player continuity, season results, and the cores that defined each period.
Baseball historyRoster dataData visualization
General
A compact index of projects, applets, and writing.
A long-running catalog of public-ready creations: current projects, interactive math sketches, and older writing brought forward with enough context to browse.
Projects
Modern creations
Prototypes and ideas, most are still in progress!
KidLinks
A lightweight relationship map for keeping track of a child's friends and the parents or guardians connected to them. Read the portfolio writeup.
Parent utilityRelationship mappingProduct prototype
WriteSpacer
A browser tool that turns dense worksheet images into printable pages with generous room for students to show their mathematical work.
Classroom utilityPrintable worksheetsMath practice
Algebuds: Student Tutors Chatbot
An Algebra 1 prototype that flips the tutoring roles: students explain their thinking to a constrained chatbot and learn by watching it apply their ideas.
Learning designAlgebra 1Recursive feedback
Historical Hex Congressional Districts
An interactive cartogram spanning all 119 U.S. Congresses, with each congressional district represented as a five-hex tile.
Congressional districtsHistorical mapsData visualization
V's Play Studio
A touch-first play studio with original characters for making temporary stickers, mixing foods, and building board games.
Kids appiPad SafariMini-apps
N's Logic Puzzler
A mobile-friendly logic-grid puzzle collection with X/O deduction marks, coins, unlocks, and quick beginner puzzles.
Logic gridsMobile gameDeduction
Math applets
Interactive math sketches
Eight featured applets from a much larger catalog of GeoGebra constructions and interactive sketches.
Cones from a Circle
Cut and fold a circle into cone models and compare how radius, arc length, and height move together.
GeometryHigh school.ggb
Factorable Quadratics
Drag the coefficient point and watch how a monic quadratic's graph, factorability, and integer roots line up.
Algebra and functionsHigh school.ggb
Lines in a Circle
Animate lines rotating through a circle and watch the paths and envelopes they create.
GeometryHigh school.ggb
Swing Hyp Down
Use a swinging right-triangle animation to connect a changing hypotenuse with geometric motion.
GeometryHigh school.ggb
Incenter Spirograph
Animate a triangle and trace its incenter into a family of geometric, spirograph-like curves.
GeometryHigh school.ggb
Completing the Square
Drag through a visual model of completing the square and watch the algebraic structure take shape.
Algebra and functionsHigh school.ggb
Distances to Vertices
Move a point around a triangle and study how its distances to the vertices change together.
GeometryMiddle school.ggb
Area vs. Perimeter
Investigate which area and perimeter combinations are possible for rectangles, adapted from a Malcolm Swan prompt.
GeometryMiddle school.ggb
And many more
Browse all 111 published applets by domain, audience, and interaction.
GeoGebraInteractive mathArchive
Talks
Presentations
Conference pages with slides, applets, handouts, and related ideas.
Exploring High School Math with GeoGebra and Desmos
A fast-moving collection of high school mathematics explorations built for an explorable-explanations gathering in San Francisco.
TalkMath education4 applets
GeoGebra: From Construction to Abstraction
A presentation about using dynamic construction as a path toward more abstract mathematical relationships.
TalkMath education4 applets
If a picture is worth 1000 words, what is GeoGebra worth?
A collection of dynamic mathematics demonstrations built around the claim that interaction can communicate more than a static diagram.
TalkMath education9 applets
Writing
Archive posts
A compact index of older posts, with expanded versions on the writing page.
Evaluative Listening and Khan Academy
Archive note: this post is preserved as evidence of Scott's product, technology, and math education thinking. The original text is preserved with modern media fallbacks.
Archive
CMC North Asilomar Wrapup Part 2! Technology: Conceptual Understanding and Intellectual Need
Archive note: this post is part of the early interactive mathematics and GeoGebra thread in Scott's writing. The original text is preserved; recovered media is linked or displayed where possible.
academicprofessionalgeogebra
Quickie Lesson Description: Zombies and Capped Exponential Growth
Archive note: this older WordPress post is preserved with its original wording. Media has been recovered where available and otherwise marked for a later pass.
professional
2015 CMC North Asilomar Wrapup - Part 1
Archive note: this post is part of the early interactive mathematics and GeoGebra thread in Scott's writing. The original text is preserved; recovered media is linked or displayed where possible.
geogebraacademicprofessional
Comments from other sites: Four animated gifs of the same awesome problem (dy/dan)
Archive note: this post is part of the early interactive mathematics and GeoGebra thread in Scott's writing. The original text is preserved; recovered media is linked or displayed where possible.
professionalgeogebrageogebra
Academic Paper Breakdown: Lampert "Teaching while students work independently"
Archive note: this older WordPress post is preserved with its original wording. Media has been recovered where available and otherwise marked for a later pass.
academicEducation Theoryteaching
Dandy Candies and OEIS
Archive note: this older WordPress post is preserved with its original wording. Media has been recovered where available and otherwise marked for a later pass.
professionalmathproblem solving
If Triangle Proofs are the aspirin, what is the headache?
Archive note: this post is part of the early interactive mathematics and GeoGebra thread in Scott's writing. The original text is preserved; recovered media is linked or displayed where possible.
professionalgeometrycontinuummath
#ContinuumMath - join the movement!
Archive writing connected to professional, geogebra, geometry.
professionalgeogebrageometry
Student Inquiry into the Neighborhood of the Special Case
Archive writing connected to professional, geogebra, geometry.
professionalgeogebrageometry
The effects of User Interface design on testing
Archive note: this post is preserved as evidence of Scott's product, technology, and math education thinking. The original text is preserved with modern media fallbacks.
professionaltechtesting
The Lines are Not Always Parallel! A geogebra approach to Alternate Interior Angles
Archive note: this post is part of the early interactive mathematics and GeoGebra thread in Scott's writing. The original text is preserved; recovered media is linked or displayed where possible.
professionalgeogebrageometry
Geogebra Doodads
Archive note: this post is part of the early interactive mathematics and GeoGebra thread in Scott's writing. The original text is preserved; recovered media is linked or displayed where possible.
geogebrageometrygeogebra
WCYDWT: Displaced Water
Archive note: this older WordPress post is preserved with its original wording. Media has been recovered where available and otherwise marked for a later pass.
professionalwcydwtalgebra
WCYDWT: Escalator
Archive note: this older WordPress post is preserved with its original wording. Media has been recovered where available and otherwise marked for a later pass.
professionalmathalgebra
Nice motivator, Holt.
Archive note: this brief post is an early snapshot of Scott's writing about textbook motivators and the limits of surface-level real-world framing. The original text is preserved.
professionalgeometrymath
Triangles by side
Archive note: this post is part of the early interactive mathematics and GeoGebra thread in Scott's writing. The original text is preserved; recovered media is linked or displayed where possible.
professionalgeogebrageometry
Circumcenters and Epicenters
Archive note: this post is part of the early interactive mathematics and GeoGebra thread in Scott's writing. The original text is preserved; recovered media is linked or displayed where possible.
professionalgeogebrageogebra
Introductory Geogebra Lesson
Archive note: this post is part of the early interactive mathematics and GeoGebra thread in Scott's writing. The original text is preserved; recovered media is linked or displayed where possible.
professionalgeogebraLesson Study