Tutor high school student in Algebra and Marine Biology

We would like to find a Stanford undergrad or grad student in Biology to tutor Algebra and Marine Biology for a junior in high school. Our family lives on Stanford campus about 3/4 of a mile from Tresidder so it is an easy walk or bike ride from campus. Ideally you are enthusiastic, good at explaining things, and available for one to two hours on Saturday or Sunday. If this sounds like a good fit for you, please email me with relevant information about your academic background (e.g. major, courses taken), and your tutoring or other relevant experience, and availability.
Thanks very much!