Since both you and SraJMcGin have looked online for this specific lesson plan, I think we can assume that it doesn't exist online. In an earlier post, you also specified that it should be for 4th graders.
Sra posted two excellent websites for this information. You may need to take this information and develop your own lesson plan that encompasses the requirements for this assignment.
It would also be helpful to know what printed text materials your students have available.
If I were developing this lesson plan, I'd --
1. List the goals and objectives
2. List the methods for achieving these goals:
a. read text
b. watch visuals
c. participate in class discussion
3. Test the students' knowledge by
a. answer factual questions in complete sentences
b. write a fictional story pretending they are an animal that lives in the water
4. Evaluate whether the students have accomplished the goals.
I am doing this for my Literacy class. our goal is not to create a unit but to find a unit and to evaluate whether or not that unit caters to the needs of the students it targets especially in terms of literacy....
Go back and read the sites recommended by SraJMcGin.
By the way, it would have helped if you had given us all of this information in your first post.