See it first
Every idea starts as a picture or interactive model, then becomes notation.
Computer Science · Intermediate+
DSA Foundations
Not a list of interview tricks. You'll understand why each data structure exists, what problem it solves, and how to reason about the cost of every operation — taught in Python with visual walk-throughs.
12 modules
~54 hours
Intermediate+
What you'll be able to do
- Analyse time and space complexity with confidence
- Implement core structures from scratch
- Recognise which pattern a new problem needs
- Think recursively and design your own algorithms
Module by module
01Algorithms and cost
Counting steps, growth rates and Big-O as an honest estimate.
02Arrays and strings
Memory layout, two pointers and sliding windows.
03Recursion
Trusting the smaller problem — with call-stack diagrams.
04Searching
Linear vs binary search and the power of halving.
05Sorting
Bubble to merge to quick — and why the difference matters.
06Linked lists
Pointers, nodes and trade-offs against arrays.
07Stacks and queues
Order as a design decision.
08Hash tables
Constant-time lookup and what makes it possible.
09Trees and BSTs
Hierarchies, traversals and balanced thinking.
10Heaps and priority queues
Always knowing what's most important next.
11Graphs
BFS, DFS and shortest paths.
12Intro to dynamic programming
Remembering sub-answers to solve big problems.
The WyPy way
Reason it through
Guided problems ask you to think and explain, not to copy a method.
Step by step
Short lessons with checkpoints, so each idea is solid before the next.
Who this course is for
Designed for
Programmers preparing for computer science study, technical interviews or more serious software work.
Before you start
Python Foundations with Real Projects, or equivalent Python experience.
Keep going
All courses
More foundations.
Ages 10–14
Foundation
Young Thinkers: Computational Thinking
Puzzles, patterns and playful logic that build a problem-solving mind before the first line of code.
Mathematics
Beginner
Mathematical Foundations
Number sense, ratios, algebraic reasoning and the habit of proof — the bedrock every other subject stands on.
Thinking
Beginner
Logic & Structured Problem Solving
A toolkit for thinking clearly: decompose, model, test and verify — on puzzles first, then on real problems.