Since the 1990's, school districts across the country have utilized a tiered bus system and staggered school start times to save money. Based on zero science, high school students were often selected to start the day in the 7:00 o'clock hour. Research now has irrefutably shown that early school start times are detrimental for adolescents. Sleep deprivation among teens is widespread and chronic. Many school boards resist delaying high school start times due to myths and fear of change.