Dozens of high-school seniors and their parents have arrived on the campus at a make-or-break moment for Ohio Wesleyan University. It’s late April, the university’s last chance to woo these admitted students in person. Every one of them counts. For Ohio Wesleyan, as for many small- and medium-size private liberal-arts colleges, tuition is the primary source of income. That makes hitting enrollment goals crucial. Demographic shifts are reducing the number of high-school graduates in Ohio. And competition for top students everywhere has never been more intense. The size of incoming classes at the university has gone up and down over the past five or six years, resulting in inconsistent tuition revenues. And so, as at many colleges these days, the admissions team at Ohio Wesleyan is trying everything it can think of to seal the deal.