1. "Tell them what you are going to tell them"
Don't assume that we know what you are up to because you were in class. Distill the part of the material that is relevant to what you are about to argue. Introduce the theme of the arguments.
2. "Tell Them"
State your arguments. " I agree with X" is NOT an argument.
3. "Tell them that you have told them"
Summarize your main point(s). Do you rest on the weight of the sum of the arguments or is there one that dominates and is the main point?
2 points - grammar/spelling if you don't spellcheck how can we take you seriously?
2 points - overall structure - TTT - See above
1 point - scientific style - Write for a scientific colleague
1 point - references cited and web links
3 points - logical argument - modus ponens
1 point - creative argument