PythonReady to draft
Python Foundations Guide
A beginner-friendly guide for variables, loops, functions, data structures, and debugging habits.
PythonLoopsFunctionsDebugging
Coming soon
Programming
Guides and interactive tools for programming concepts.
Use programming guides for lecture structure, then connect students to visual tools for algorithms, data structures, debugging, and complexity thinking.
Start here
A structured path for teaching and self-study.
Each resource is grouped by purpose so students can read a guide first, then open a browser-based tool when they are ready to inspect an example artifact or practice a concept.
3
Learning guides
32
Interactive tools
Learning guides
Guides
Teaching-first walkthroughs for core programming concepts and coding workflows.
General programmingReady to draft
Algorithm Thinking Guide
Learn decomposition, step-by-step reasoning, pseudocode, and Big-O basics with practical examples.
AlgorithmsPseudocodeBig-OProblem solving
Coming soon
General programmingPlanned
Data Structures Guide
A practical guide to arrays, linked lists, stacks, queues, trees, and graphs for teaching labs.
Data structuresStackQueueTree
Coming soon
Interactive tools
Interactive tools
Browser-based programming tools students can use directly while learning concepts.
PythonAvailable
Python Code Visualizer — Step-by-Step Execution
Run Python code line-by-line and inspect variables, stack frames, and data structures at each step.
Python VisualizerPython Code VisualizerStep By StepPython Execution TracePython Tutor
PythonAvailable
Python Formatter & Syntax Checker — Free Online
Format Python code with PEP 8 style rules and check for syntax errors with line-specific feedback.
Python FormatterPython Syntax CheckerPep8 FormatterPython Code FormatPython Linter
ProgrammingAvailable
Algorithm Visualizer — Sort, Search & More
Step through classic algorithms — bubble sort, binary search, linear search, factorial — with live variable inspection.
Algorithm VisualizerSorting VisualizerBubble Sort VisualizerBinary Search Visualizer
ProgrammingAvailable
Regular Expressions Interactive Demo
A teaching-first regex playground for testing patterns, flags, capture groups, replacements, and common text-processing examples.
Regular Expressions InteractiveRegex Learning ToolRegex TesterCapture GroupsRegex FlagsText Processing
PythonAvailable
Python Loop Visualizer — Trace For & While Loops
Step through Python for and while loops and see loop variables and accumulator changes at each iteration.
Python Loop VisualizerFor Loop TraceWhile Loop TracePython Loop Debug
PythonAvailable
JSON to Python Objects Converter
Convert JSON data to equivalent Python dict, list, and literal representations instantly.
Json To PythonJson To DictConvert Json PythonJson Python Converter
PythonAvailable
Pseudocode to Python Converter
Convert plain English pseudocode to structured Python starter code with rule-based mapping.
Pseudocode To PythonPseudocode ConverterPseudocode PythonConvert Pseudocode
PythonAvailable
Python Quiz Generator — Practice Challenges
Practice Python with multiple-choice questions on variables, loops, functions, lists, and more.
Python QuizPython PracticePython McqPython QuestionsLearn Python Quiz
ProgrammingAvailable
Big-O Complexity Explainer — Time & Space
Learn and compare time complexity notations with examples, code, and a complexity comparison table.
Big O NotationTime ComplexityAlgorithm ComplexityBig O ExamplesO(n) O(log N)
PythonAvailable
Python Recursion Visualizer — Call Tree & Stack
Visualize recursive Python functions with a call stack view, argument and return value tracking.
Python Recursion VisualizerRecursive Function TraceCall Stack PythonRecursion Debug
ProgrammingAvailable
Multiprocessing Simulator — CPUs, Cores, Threads & Speedup
Explore how CPUs, cores, threads, parallel work, and overhead affect estimated runtime and speedup.
Multiprocessing SimulatorParallel SpeedupAmdahl Law SimulatorCpu Core ThreadThread Contention
PythonAvailable
Python Line-by-Line Executor — Step Execution
Execute Python code one line at a time with forward/backward controls and per-step explanations.
Python Line ByPython Step ExecutionPython StepperExecute Python Step
PythonAvailable
CSV to Python Objects Converter
Convert CSV data to Python list of dicts or list of lists with automatic header detection.
Csv To PythonCsv To DictConvert Csv PythonCsv Python Converter
ProgrammingAvailable
Truth Table Generator — Boolean Logic
Generate truth tables for Boolean expressions with AND, OR, NOT, XOR operators (up to 4 variables).
Truth Table GeneratorBoolean LogicTruth TableLogic GatesBoolean Expression
ProgrammingAvailable
Binary Search Tree Visualizer — Insert, Search, Delete
See BST ordering rules and highlight insertion/search paths and deletion cases step by step.
Bst VisualizerBinary Search TreeBst Delete CasesInorder Traversal Sorted
ProgrammingAvailable
Heap Visualizer — Min-Heap / Max-Heap
Learn heaps as complete binary trees stored in arrays. Bubble-up and heapify-down steps included.
Heap VisualizerMin HeapMax HeapHeapifyBubble Up
ProgrammingAvailable
Graph Visualizer — Nodes, Edges, BFS & DFS
Build a graph, switch directed/undirected mode, and run BFS/DFS with visited/frontier highlights.
Graph VisualizerBfsDfsDirected GraphUndirected Graph
ProgrammingAvailable
List / Array Visualizer — Indexes, Insert, Remove
Understand indexed access and shifting on insert/remove with a clean array-cell view.
Array VisualizerList VisualizerIndex AccessInsert RemoveData Structure Visualizer
ProgrammingAvailable
Priority Queue Visualizer — Serve By Priority
Learn how priority queues serve next items by priority (min/max) with history and explanations.
Priority Queue VisualizerMin PriorityMax PriorityHeap Priority Queue
PythonAvailable
Python Stack Frame Visualizer — Call Stack View
Inspect the Python call stack at each execution step — view active frames, local variables, and return values.
Stack Frame VisualizerPython Call StackPython Frame InspectorPython Stack Trace
PythonAvailable
Python Diff Checker — Compare Code Snippets
Compare two Python code snippets side-by-side with a unified diff view and change summary.
Python DiffCode DiffCompare Python CodePython Code Comparison
PythonAvailable
Python Debugging Practice — Find & Fix Bugs
Practice debugging skills by finding and fixing intentional bugs in Python code snippets with hints.
Python Debugging PracticePython Bug FixDebug PythonPython Bugs
PythonAvailable
Python Data Structure Explorer — Lists, Dicts, Sets
Explore Python lists, dictionaries, sets, and tuples interactively with visual block representations.
Python Data StructuresList VisualizerDict VisualizerPython Containers
PythonAvailable
Python Dictionary Visualizer — Explore How Dicts Work
See how dictionary keys are hashed, stored, updated, and retrieved step by step.
Python Dictionary VisualizerPython Dict VisualizerHash Table VisualizerDictionary HashingPython Dict Lookup
ProgrammingAvailable
Stack Visualizer — Push, Pop, Peek (LIFO)
Learn stack operations step by step with a visual “top” view and underflow handling.
Stack VisualizerLifoPush Pop PeekData Structure VisualizerStack Tutorial
ProgrammingAvailable
Queue Visualizer — Enqueue, Dequeue (FIFO)
Learn queue operations step by step with front/rear labels and FIFO intuition.
Queue VisualizerFifoEnqueue DequeueData Structure VisualizerQueue Tutorial
ProgrammingAvailable
Linked List Visualizer — Nodes, Pointers & Traversal
Visualize nodes and next pointers. Insert/delete/traverse with highlighted steps.
Linked List VisualizerNodes And PointersTraversalData Structure Visualizer
ProgrammingAvailable
Tree Visualizer — Hierarchy, Levels & Traversal
Learn tree concepts (root/parent/child/leaf) and traversals with step-by-step highlights.
Tree VisualizerTree TraversalPreorder Postorder LevelData Structures Visualizer
ProgrammingAvailable
Deque Visualizer — Push/Pop From Both Ends
Learn a double-ended queue with front/rear operations and step-by-step explanations.
Deque VisualizerDouble Ended QueuePush FrontPush BackPop FrontPop Back
PythonAvailable
Python Variable Tracker — Track State Changes
Track how Python variables change at every execution step with before/after highlighting.
Python Variable TrackerVariable TracePython State TrackerVariable Changes Python
PythonAvailable
Python Variable Trace Table Generator
Auto-generate a variable trace table from Python code execution for dry-run study.
Trace TableVariable TracePython TraceDry Run TableExam Trace Table
ProgrammingAvailable
Set Visualizer — Uniqueness, Membership & Set Ops
See how sets store unique elements and perform union/intersection/difference.
Set VisualizerUnion Intersection DifferenceUnique ValuesData Structure Visualizer
Suggested learning path
Start with Python foundations, then move through algorithm thinking, visualizers, data structures, debugging practice, and Big-O complexity.