Contact

For questions, corrections, lesson requests, or business inquiries, send an email to ca513zn@gmail.com.

Replies usually arrive within a few days. Please write in English or Spanish.

Reporting a mistake in a post

If you spot an error in a lesson — a wrong example, a typo, an unclear explanation — include the post title and a short note about what is wrong. Corrections are reviewed and applied promptly.

Privacy questions

For questions about how your personal data is handled, including requests to access, correct, or delete your data, write to the same address with the subject line Privacy request.