MUNCIE, Ind. (AP): Many of Ball State University's 18,000 students are facing Friday evening and Saturday classes to make up for two days of courses canceled by extreme cold this month. Ball State officials called off classes Jan. 6-7 on the Muncie campus as wind chills reached about 35 degrees below zero. Those were the first two days of Ball State's spring semester, while Indiana and Purdue universities didn't start classes until the following week.