Il y a en français (there is and there are in French)

It is difficult to find a presentation explaining this topic, this one contains the uses of the form il y a in French and the different variations depending on the use, It also has a beautiful example of how this form is used with the school supplies. Enjoy it. 

https://drive.google.com/file/d/1lUEPkX24r9SRlhQBUYThCFL-xtPXBwwq/view?usp=sharing