For this assignment, you are being asked to either modify an existing amendment.

First, you will need to include your modified amendment. The modified amendment should consist of the original amendment, with the change notated.
For example, if I am changing the Second Amendment, my first paragraph would be: A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.  Do not put in two different versions of the amendment, just show the editing within the amendment.
The next paragraph will have your thesis.  To continue my example, my thesis for this modification would be: The right of the people to keep and bear arms should be an individual right and not infringed by state regulation or position within a militia.  You could also include your reasons why, if you are able to state those reasons succinctly.
Finally, you will have your annotated bibliography.  This needs to follow current APA formatting and consist of at least three scholarly journal articles. Scholarly or peer-reviewed articles are written by experts in academic or professional fields. They are excellent sources for finding out what has been studied or researched on a topic as well as to find bibliographies that point to other relevant sources of information.  A newspaper article or website will not meet the requirements of the three resources.  The accompanying annotations need to be concise and support your original thesis.
If you are unable to find research that supports your modification then that means that you need to make a different change!  I would suggest working backward in a way, and start doing the research before landing on a firm topic.  Let the research guide your final thesis.