Every time you write, you have a chance to improve your writing skills. To improve your skills, you want to look over any comments your instructor, peer reviewer, tutor, or TA makes on your assignment. Many instructors seek to educate through their comments and can give you important tips for improving your writing or adding to the information you convey.
Students who wish to improve over time should request such information from their instructors and keep a journal for developing an improvement plan. This is an example personal checklist that you can use to make improvements on your writing.
Although checklists are handy, you may prefer to keep an informal journal of your writing progress. Ask your instructor for feedback on how your writing and thinking have progressed during the term and what you should work to improve.