Individualized Error

In this example of individualized error from my first draft of my showcase project, I forgot to add an apostrophe to ‘Alexanders’.  When I am rushing through an assignment I tend make alot of puntuational errors.  However, from the beginning of the semester to now I feel as though I have made less punctuational errors but it is still something I need to work on in my papers.  This error also goes along with proofreading my papers, something I also need to do in order to produce quality papers.  Furthermore, I do believe I have imporved on my compound and subordinate sentences seen in my papers.