(www.santillana.es or your country’s version – e.g., santillana.com.mx, santillana.com.co). Look for “Science 3 Primaria” – often under “Saber Hacer” , “Los Caminos del Saber” , or “Proyecto Saber” series.
Introduction to different materials, their properties (solid, liquid, gas), and types of energy.
Classification of animals into vertebrates (birds, mammals, fishes, reptiles, and amphibians) and invertebrates.