The Comma

One of the most challenging things you will face when trying to learn English is mastering the comma.

When do I use a comma? Where should I put it in my sentence? Is it the same as a period? 
To answer  your questions, I invite you to read through this presentation below. 

Click here.  

You will be directed to a screen that looks like this:  
 

Click on the Powerpoint Presentation (next to the words Media File).  It says:  Conquering the Comma PowerPoint Presentation. 

Read through the presentation completely. We will discuss it as a class and then practice applying the rules.