# Valeria Carrillo, Ed.D.

For over 10 years, Dr. Valeria Carrillo has designed learning experiences that engage students through active learning, real-world language tasks, and online community building.

### Articles by Valeria Carrillo, Ed.D.
- [**Cognates in Spanish and how to learn from them**](https://blog.duolingo.com/cognates-in-spanish/) - Jun 11
- [**Die Verwendung des Imperfecto im Spanischen**](https://blog.duolingo.com/imperfecto-im-spanischen/) - Jun 6
- [**How to use the imperfect tense in Spanish**](https://blog.duolingo.com/imperfect-tense-spanish/) - May 23
- [**Tipps zur Verwendung des Indefinido im Spanischen**](https://blog.duolingo.com/indefinido-im-spanischen/) - May 11
- [**Tips for using the preterite tense in Spanish**](https://blog.duolingo.com/preterite-tense-spanish/) - Mar 15
- [**Mach’s und tu’s! Wie du im Spanischen Aufforderungen formulierst**](https://blog.duolingo.com/machs-und-tus-wie-du-im-spanischen-aufforderungen-formulierst/) - Mar 10