Santillana often sells official eBook versions of their primary textbooks. Search for "Natural Science 6 Primary Student's Book Santillana" on Amazon.es or Google Play Books. Prices range from €20-€35. You can read this on any device, search within the text, and it is 100% legal.

In-depth study of ecosystems, biodiversity, and environmental conservation.

: Exploration of sexual characteristics, fertilization, pregnancy, and birth. Energy and Matter