Last spring, while millions of American students were bubbling in answers to multiple-choice questions on the ubiquitous tests that determine school and teacher ratings, student promotions, graduation, and college admissions, some students were meeting a higher standard. At the Urban Academy, a second chance high school in New York City that is part of the New York Performance Standards Consortium, Gemma Venuti completed the set of research papers that were part of her graduation portfolio — and defended them before a committee of teachers, students, and experts from outside the school.