An introduction to how living things interact with their environment and the importance of biodiversity and conservation.
While searching for these materials, it is important to remember that Santillana’s textbooks are copyrighted. Most schools provide access to digital platforms (like the Santillana Richmond "i-book") where students can legally view the content. Many websites offering "free PDF downloads" may be unauthorized or incomplete.
Simple physics concepts, including the properties of materials, states of matter (solid, liquid, gas), and different forms of energy like light and heat.