OXFORD, Mich. — Several hundred Oxford High School students walked out of class Thursday, gathering on the school’s football field after leaving the building to honor students and teachers killed in Texas on Tuesday. Footage posted on social media from other outlets shows the students standing in a “U” shape after filing from the school onto the field. The walkout lasted for about half an hour. The walkout comes two days after a mass shooting at a Texas elementary school where 21 people, including 19 children, were killed. Andrew Sholtz, a 16-year-old Oxford High sophomore, walked with others …