International comparisons indicate that U.S. students test below other industrialized countries. Researchers identify a shorter school day and year as a possible reason. While recognizing the fundamental differences from country to country, this study focuses on the measurable variables; days of instruction per year and total hours of instruction for lower elementary students. Comparisons with Japan, Switzerland, Germany, Canada, and the United States, find that U.S. instructional days are fewer, however, the length of day is longer, and that total annual hours are second only to Japan. The amounts of homework and out of school learning are also discussed. The three month U.S. summer vacation schedule, which results in greater review time, is examined. The Year-Round Education calendar is suggested as an alternative to provide for more continuous learning and to accommodate the needs of the student at ris