In one of her final acts as UW-Madison chancellor, Biddy Martin asked the UW Board of Regents if she can set aside money so that low-and-middle income students won?t have to pay a proposed 5.5 percent tuition increase. Martin sent a letter to the Regents and UW System President Kevin Reilly on Friday seeking approval to use $2.3 million from the 2011-12 tuition hike so that families with annual household incomes of less than $80,000 won?t have to pay the increase.