Registration for the Marlborough Public Library’s Teen Writing Competition closes Friday. The competition is open to all teen residents or students in Marlborough. There will be four prizes of $100 awarded, two for each age group (seventh- to ninth-graders and 10th- to 12th-graders) in the categories of stories and poetry. Entries must be fewer than 1,000 words for fiction and nonfiction stories, and less than 30 lines of poetry. To enter, fill out a registration form, which is available on the library’s page at www.marlborough-ma.gov, and e-mail it, along with your writing submission, to Jess Bacon, the young-adult librarian, at jbacon@cwmars.org. - Derek McLean