Spanish grammar

In 8th grade advanced Spanish we are learning some grammar. We are learning demonstrative adjectives, which we have already learn in language arts class. They are, this, that,these, and those. Also the forms of them in Spanish depend on if the object you're referring to is close, not close, or far away. We did many practices with this in our books with pictures and we would say where the object was, and what it was. So for example if I were to say "That book" (referring to it close) it would be " este libro". So depending on where something is and if it is or masculine or not, that is where you would pick what form and the location of it.