 In 1914, Emily Griffith, a Denver school teacher, opened the Opportunity School which featured language and vocational instruction as both day classes and night classes so that non traditional learners would have the opportunity for self-improvement.Also during this period Denver's park system was expanded and land in the mountains was acquired for a future mountain park system.Cattle pens began to spring up around the existing railroad depots as farmers began shipping their livestock to the existing meat packing industry in Kansas City and Chicago.