Works with your subscription
One connector in your assistant’s settings — nothing separate to install or to pay for.
Courses you take inside your own AI assistant
You connect L-System to Claude, ChatGPT or another assistant — and it walks you through the course the way that suits you: at your pace, with your examples, in your language. We remember where you stopped. The exam you take yourself, here, without the assistant.
Signing up is free
Taught your way
Shorter or deeper, with tasks from your own work, with diagrams described in words — you ask, the assistant rebuilds.
Language is not a barrier
Your assistant explains things in your language even when the course is written in another. The exam is taken on the site and is not translated: it is in the language of the material — or, for a course that teaches a language, in that language. Every course shows which.
Your own course in an evening
Ask your assistant to build a course out of your materials — for students, for colleagues, or just for yourself.
Starting costs nothing
Most of the catalog is open for free, exam and certificate included.
The course path
- 1Pick a course
Enrol for free straight from the catalogue.
- 2Paste the connector
Into your assistant’s settings, once. Takes a minute.
- 3Learn in the chat
The site is for later — for the exam and the certificate.
- 4Exam and certificate
The exam runs on the server, without the assistant. Verified by link.
The exam goes past the assistant
Questions are never handed to it: your assistant may teach, but only you may answer. That is why the certificate means something, and why anyone can check its signature.
Start today
Whole catalog — 16 coursesAZ-900: Microsoft Azure Fundamentals — prep for the 20 July 2026 skills outline (in Russian)
Exam-focused preparation for AZ-900: Microsoft Azure Fundamentals, built strictly against the skills measured as of 20 July 2026. Nineteen required units cover all three domains at their official weights: cloud concepts, Azure architecture and services, management and governance. Every service is taught as pain, then solution, then cost — because the exam asks which option fits a constraint, not what a service is called. A dedicated unit untangles the pairs candidates confuse most: Advisor and Monitor and Service Health, VPN Gateway and ExpressRoute, RBAC and Policy and resource locks, Cool and Archive, availability zones and region pairs. Three optional units cover databases, traffic delivery and secrets — useful at work, explicitly out of exam scope. Course text is in Russian; Azure service names stay in English, as you will meet them on the exam and in the portal.
Material: Russian · lesson in your language · Exam: Russian
C# 14 and .NET 10: From Surface Knowledge to Working Knowledge (Extended)
For developers who "know C#" but stall at code review and in interviews when asked why something is built the way it is. The language is taught not as a list of constructs but as a set of decisions with a price: value and reference types, memory and the garbage collector, equality, null, pattern matching, strings and Span, generics, collections, LINQ, exceptions, async and concurrency, data at the process boundary, reflection and source generators. Five units then take SOLID one principle at a time, each as the answer to a concrete pain rather than a slogan. Design patterns follow — creational, structural, behavioural and the applied .NET ones — always including the case where the pattern hurts. The course closes on testability, talking through an architecture decision out loud, and what is new in C# 13 and 14. An optional branch, "C# in an application", takes the language into a working service: the host and DI, Minimal APIs, HttpClient and background jobs, EF Core, tests, and deployment to Azure. Every example lives in one system, the ENGAGE backend of the fictional firm Aldervane. Targets C# 14 / .NET 10 LTS. Written in Russian.
Material: Russian · lesson in your language · Exam: Russian
Tiles and Porcelain Stoneware DIY: From Substrate to Grout
A course for people who have never laid tiles but want to do a bathroom, a kitchen backsplash or a hallway floor themselves without redoing it. You will learn to read packaging labels, choose adhesive, grout and waterproofing by class (EN 12004, EN 13888), estimate materials and budget, prepare the substrate, waterproof the wet zone, set out, cut and lay tiles on floors and walls, grout and inspect the result. Materials and prices are from the Ukrainian market in 2026. Hands-on skill is built on a practice board with a checklist or photo self-check. Electrics, large formats and level-access showers are covered only as an overview, with clear 'call a professional' thresholds. The course is in Ukrainian.
Material: Ukrainian · lesson in your language · Exam: Ukrainian
What the assistant makes
all recipes (3)Real results: an assistant built a page from a course unit using a learner’s settings. Each recipe shows the settings, the prompt and how to repeat it yourself. Your assistant will do it its own way: a recipe is an example, not a promise.
Deployment options and configuration parameters
AI-901: Microsoft Azure AI Fundamentals — Exam Prep with Microsoft Foundry
LAY, BEAR, LET and BE
English Phrasal Verbs (Extended)
How to get the same
- Open a recipe
- Apply these settings
- Tell your assistant the prompt