Interactive
Binary search
Pick a target and watch the search space halve with every guess.
Try itChoralSoft Learn
Learn something new today
Interactive explainers, printable cheat sheets, learning paths and study guides, all free, with no sign-up.
Interactive explainers
Hands-on versions of ideas from the ChoralSoft articles and books.
Interactive
Sorting algorithms
Compare bubble, insertion, selection, merge and quick sort on the same data.
Try itInteractive
BFS versus DFS
Draw walls in a maze and see how the two searches explore differently.
Try itInteractive
Big-O growth chart
Drag a slider and see why exponential growth is so dangerous.
Try itInteractive
Bayes’ rule
Why a spam filter that is 95% accurate can still be wrong most of the time.
Try itInteractive
Stacks and queues
Add the same items to both and compare what comes out first.
Try itInteractive
Dynamic programming
Fill a coin-change table one cell at a time.
Try itInteractive
Hash tables
Drop words into buckets and watch collisions chain.
Try itFree tools and plans
Printable
Cheat sheets
Big-O, sorting, graph algorithms, statistics and ML math, one printable page each.
Open cheat sheetsPlan
Learning paths
Zero to ML math in 12 weeks, or algorithms foundations in 8, with one lesson unlocking each week.
Start a pathChecklist
Medicare enrollment checklist
Key dates, a plan review checklist, doctor questions and a plain-English glossary.
Open the checklistChecklist
Trip planning and packing
The Ten Essentials, seasonal extras and a trip planning checklist.
Open the checklistUpdates
Roadmap
What is available, what is in development, and how to ask for what you want.
See the roadmapStudy guides for classic audiobooks
Themes, characters, vocabulary and discussion questions for 10 classics narrated by ChoralSoft.