Sample Lesson

Regular text is Markdown. Use ## headings and they appear in the right-hand table of contents.

Notes and callouts

Matter — anything that has mass and takes up space.

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❓ Which is a state of matter?

🧪 Problem 1

What is 2 + 2?

💡 Hint 1

Think of two pairs.

💡 Hint 2

Count on your fingers.

✅ Answer

Or use separate blocks:

💡 Hint 1

Look at the units.

✅ Show answer

The answer is 42.