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03

HTML Syntax: How the Language Is Written

Learn how tags, attributes, empty elements, nesting and comments work so your markup stops being guesswork and starts feeling readable and deliberate.

How much do you know about HTML?

📘 Theory

Opening and Closing Tags

This is the first pattern your eyes need to learn.

🏁 Challenges

Challenge Challenge: Add a Missing Alt Attribute Complete an image tag with the accessibility detail it needs.
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🧰 Resources

Useful links

WHATWG HTML Standard web.dev Learn HTML MDN HTML MDN HTML Elementos
Test

Check your knowledge with a test about HTML.

Test for HTML
Course resources 27
📘 Glossary 🎧 Audio 📄 PDFs 🖼️ Infographics 🎬 Videos 🔗 Links 🧠 Flashcards 🧩 Snippets
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Lesson 02
Tools for Writing HTML
Lesson 04
Headings and Paragraphs
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What is this?

I'm Cristian Eslava and I sometimes build websites so both you and I can learn and experiment. culTest

I made this in February 2026 to make learning easier for my students. The idea is to learn web development by practicing and to keep expanding the project with new topics, tests and challenges.

It draws inspiration from MDN, W3Schools, CodePen, Manz and many other web development references. I wanted to combine useful theory, runnable examples, challenges and the testing system I had already built for culTest. culTest

If you liked it, if you didn't, or if you want to get in touch, write to me at cristianeslava@gmail.com