How This Course Works
You'll learn to
- -Understand the three phases of Algorithm Fundamentals (Python) and what each one builds toward
- -Know what a "Lab Bridge" is, and why Phase 1 mostly doesn't have one
- -Understand the read, quiz, build loop you'll repeat every chapter
The Forge Algorithm Lab is a 76-level coding lab - real functions, real classes, real hidden test cases, graded by an actual sandboxed interpreter rather than a "looks about right" checklist. That's great once you can write Python fluently, but it's a rough place to start if you've never written a line of code before. Algorithm Fundamentals (Python) is the on-ramp: a guided reading course that teaches the language and the thinking first, then hands you off to the lab level that puts each idea to work.
Three Phases, One Destination
- -Phase 1 - Python in Depth (Tiers 0-3): variables, control flow, collections, functions, and object-oriented programming - the actual mechanics of the language, with zero assumed prior knowledge.
- -Phase 2 - Algorithms (Tiers 4-6): the classic patterns - searching, sorting, recursion, two pointers, and more - bridged directly into Forge Levels 1-10 and 61-76.
- -Phase 3 - Applied Systems Algorithms & Capstone (Tier 7): the harder, systems-flavored levels - Levels 11-60 - where algorithmic thinking meets real engineering problems.
The Loop: Read, Quiz, Build
Most chapters follow the same rhythm: read the chapter, take a short check-yourself quiz if one is attached, then - once a chapter has a Lab Bridge - go solve the linked Forge level before moving on. Reading builds the mental model; the lab is where that model gets tested against a real problem and a real grader that doesn't grade on vibes.
You're allowed to read ahead, skip around, or reread a chapter after a lab attempt goes badly. The course is linear by default because each idea builds on the last one, but nothing stops you from jumping back.
Why Phase 1 (Mostly) Has No Lab Bridges
Here's a fact about the Forge Algorithm Lab that shapes this entire course: the very first "real" level, Level 2 - Stack from Scratch, already asks you to write a class with methods and internal state. Nothing about variables, loops, or dictionaries alone gets you there - you need object-oriented programming first, and that isn't taught until Phase 2. So for most of Phase 1, there's simply no level you're equipped to attempt yet, and forcing a premature Lab Bridge would just send you into a level you can't finish.
There is exactly one exception, and it happens soon: Level 1, "Big-O Detective," is pure functions, loops, and dictionaries - no classes required. It shows up as a Lab Bridge at the very end of Tier 1, the moment you've learned enough collections to take it on. After that, bridges pause again until Phase 2 introduces classes and unlocks the rest of Levels 1-10.
So don't be alarmed that the first several chapters end without a "go build this" card - that's by design, not an oversight. When a Lab Bridge does appear, treat it as a signal: you now know enough to solve a real, graded problem, not just follow along with an example.