> ## Documentation Index
> Fetch the complete documentation index at: https://docs.modeldiplomat.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Lessons
> How individual lessons work — reading content, exercise types, and XP
Lessons are the core unit of learning inside a course. A typical lesson takes 5–15 minutes and combines reading content with interactive exercises. When you finish a lesson, you earn XP and unlock the next one.
## Lesson structure
Every lesson follows a similar structure:
The lesson starts with 1–3 screens of reading content. This explains the core concept you're about to practice. Read it carefully — the exercises will test this directly.
A sequence of 3–10 exercises, depending on the lesson. Each exercise type is described below.
When you finish all exercises, you see your score, the XP you earned, and a prompt suggesting an Atlas search to apply what you just learned.
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## Exercise types
### Multiple Choice
The most common type. You're shown a question and 3–4 options. Select the correct one.
* If you answer **correctly**: you get a green confirmation and move on
* If you answer **incorrectly**: you see a red indicator and an explanation of why the correct answer is right. You'll see a similar question later in the lesson.
### Fill in the Blank
A sentence with a missing word or phrase. Type the correct answer.
* Minor spelling differences are accepted
* You get one attempt, then the answer is shown with an explanation
### Matching
Two columns of terms or concepts. Drag items on the right to match them with items on the left.
* All pairs must be correctly matched to proceed
* Incorrect pairs are highlighted so you can see which ones are wrong
### Ranking
A list of items you need to put in the correct order — chronological, by importance, by sequence, or by some other criterion.
### Multiple Select
Like multiple choice, but more than one answer is correct. Select all that apply.
### Writing Prompt (AI-graded)
A short written response to a question. These are graded by AI, which looks for:
* Presence of key concepts
* Logical structure
* Appropriate length and content
You'll get immediate feedback explaining what you got right and what could be stronger.
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## Scores and mistakes
Lessons track your **score** (correct answers) and **mistakes** (wrong answers). A higher score earns more XP. Mistakes don't penalize you harshly — they trigger a second attempt at the concept later in the lesson.
**Perfect lesson bonus:** Answer every exercise correctly on the first attempt to earn a small XP bonus on top of the standard lesson reward.
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## The Atlas search prompt
At the end of every lesson, there's a suggested Atlas search — a real question that connects the lesson's concept to current events or a real-world scenario. This step is optional, but highly recommended. It takes 2 minutes and dramatically improves retention.
For example, after a lesson on UN Security Council veto mechanics, the suggested search might be: *"Which countries have used the Security Council veto most recently and why?"*
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## Picking up where you left off
If you close a lesson mid-way, your progress is not saved — you'll restart from the beginning when you return. Plan to finish a lesson in one sitting (most take under 15 minutes).
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A quick daily practice that keeps your streak alive
Find the right course for your goals