Divide a piece of A4 paper into 6 or 8 (thirds into sixths or quarters into eighths). Create a storyboard with pictures and words telling us about the story of how Tenochtitlan was created. If you can, make your pictures bright and colourful. The best ones, in the past, have been completed with felt tip pens and they are full of colour leaving very little white on their pictures. I will upload some examples to help you.
Use the story, separate it into 6-8 sections and create that as a picture. You can add sentences to help tell the story.