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@openstem · Joined Jul 2026
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Mathematics · L3 · Algorithms & Big-O Basics · flowchart
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Mathematics · L3 · Algorithms & Big-O Basics · flowchartFlowchart7 objects
Mathematics · L3 · Piecewise Functions & Step Functions · flowchart
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Mathematics · L3 · Sum, Difference & Double-Angle Identities · flowchart
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Mathematics · L3 · Sum, Difference & Double-Angle Identities · flowchartFlowchart7 objects
Mathematics · L3 · Parametric Equations & Motion · flowchart
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Mathematics · L3 · Parametric Equations & Motion · flowchartCollection7 items
01Software · L1 · What Is a Computer?
02Software · L1 · Algorithms: Step-by-Step Instructions
03Software · L1 · Putting Steps in Order
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Software · L1 · Foundations & SyntaxCollection5 items
01Fundamentals
02Types & Coercion
03ES6+ Features
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Software · L1 · JavaScriptCollection4 items
01Types & Inference
02Everyday Types
03Software · L1 · TypeScript: Handling Optional and Nullish Values
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Software · L1 · TypeScriptCollection4 items
01Core Types
02Functions & Decorators
03Software · L1 · Python: Choosing the Right Collection
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Software · L1 · PythonCollection4 items
01Rendering & Reconciliation
02JSX & Components
03Software · L1 · React: The Render Cycle
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Software · L1 · ReactCollection4 items
01Big-O & Complexity
02Linked Lists
03Software · L1 · Data Structures & Algos: Picking the Right Approach
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Software · L1 · Data Structures & AlgosCollection4 items
01Databases & Storage
02APIs & Protocols
03Software · L1 · System Design: Choosing a Database Type
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Software · L1 · System DesignCollection4 items
01Joins
02Aggregation & Grouping
03Software · L1 · SQL: Transactions & ACID
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Software · L1 · SQLCollection4 items
01Core Concepts
02Setup & Configuration
03Software · L1 · Git & Dev Workflow: The Feature Branch Workflow
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Software · L1 · Git & Dev WorkflowCollection4 items
01Fundamentals
02Syntax & Control Flow
03Software · L1 · Go: new(), make(), or a Literal?
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Software · L1 · GoCollection4 items
01Rust Syntax & Basics
02Ownership & Borrowing
03Software · L1 · Rust: Move, Borrow, or Clone?
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Software · L1 · RustCollection4 items
01Core Java
02Syntax & Control Flow
03Software · L1 · Java: Classes & Objects
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Software · L1 · JavaCollection4 items
01CSS Layout
02HTML & Semantics
03Software · L1 · HTML & CSS: How the Browser Renders a Page
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Software · L1 · HTML & CSSCollection4 items
01Core & Event Loop
02Modules & Packages
03Software · L1 · Node.js: Event Loop Walkthrough
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Software · L1 · Node.jsCollection4 items
01HTTP Fundamentals
02TCP/IP & DNS
03Software · L1 · Networking & HTTP: Anatomy of a Web Request
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Software · L1 · Networking & HTTPCollection4 items
01Processes & Threads
02OS Fundamentals
03Software · L1 · Operating Systems: The Process Lifecycle
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Software · L1 · Operating SystemsCollection4 items
01Fundamentals
02Threads & Processes
03Software · L1 · Concurrency: Protecting Shared State
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Software · L1 · ConcurrencyCollection4 items
01Authentication & Authorization
02Security Fundamentals
03Software · L1 · Security & Auth: Login & Session Flow
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Software · L1 · Security & AuthCollection4 items
01Docker
02Docker Compose Fundamentals
03Software · L1 · Docker & Kubernetes: Image Build & Deploy Lifecycle
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Software · L1 · Docker & KubernetesCollection4 items
01Test Types
02Practices
03Software · L1 · Testing: The Red-Green-Refactor Cycle
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Software · L1 · TestingCollection4 items
01Pattern Fundamentals
02Creational Patterns
03Software · L1 · Design Patterns: Choosing a Creational Pattern
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01Core & Dependency Injection
02Configuration & Properties
03Software · L1 · Spring Boot: Application Lifecycle & Logging
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Software · L1 · Spring BootCollection4 items
01Language Basics
02Control Flow & Functions
03Software · L1 · Dart: Packages & Tooling
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Software · L1 · DartCollection4 items
01Widgets & State
02Dart for Flutter
03Software · L1 · Flutter: Styling & Theming
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Software · L1 · FlutterCollection4 items
01Rendering & Routing
02Next.js Fundamentals
03Software · L1 · Next.js: Images, Fonts & Assets
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Software · L1 · Next.jsCollection4 items
01Architecture
02Decorators & Routing
03Software · L1 · NestJS: Request Lifecycle
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