• Mrs. O'Brien joined the Port Washington High School Math Department in the fall of 2006.  Currently, she is teaching Comprehensive Math, Honors Pre-Calculus, and AP Calculus BC. Mrs. O'Brien has a Bachelor of Science degree in Secondary Mathematics Education from the University of Wisconsin - Madison, and a Master's degree from Cardinal Stritch University.  She is available to help students before and after school most days of the week. She also encourages students to visit the math study hall during their study hall if they have questions.