Student absences were higher than usual on Monday in several schools in western Kenosha County — a day that was a holiday for many other schools. While Kenosha Unified and Wilmot Union High School and its feeder schools resumed classes Tuesday, Central High School and its feeder schools in Bristol, Salem, Paris had classes Monday. The number of absences was fairly significant in some districts. At Central High School, approximately 420 students, or 37 percent, were absent Monday. Officials said the decision to resume school Monday rather than Tuesday was made to avoid extending the school year by an extra day.