WEBSITES to understand better the two first units

These website is in spanish, but I have not found any better one to explain the two first units of our book.

http://www.edistribucion.es/anayaeducacion/8420146/datos/Bloque1/Bloque1.htm


This website will help us with relief vocabulary.

http://www.harcourtschool.com/glossary/horizons/

The concept map related to the Unit 2: