Video: This is a video that will help improve the understanding of the topic.

Activity: We propose an activity to help the students further consolidate their understanding of the topic.

Animations: This topic has features with which you can interact, these are usually animations. Most of the animations can be expanded to full screen size, on a new window, ideal for showing on an interactive whiteboard. The animations will play all the way through or can be viewed one section at a time.