Students are also asked to discuss whether the evidence used by the author was convincing to them. My goal is to improve both the math and writing skills of students. I view math and prose in much the same way. When done well, both can be beautiful, or eloquent. It is language and logic combined.
Language can and often is used without logic.
What I can help students most with in their writing is to help them improve the reasoning or logic in their writing. The writing assignments include both individual and group assignments. AGSC 100 Course Pack, Marshall and Wehner, Fall 1999.