The year-round calendar is an increasingly popular alternative to the traditional 9-month school calendar. This digest examines the benefits and challenges of teaching in year-round schools. Year-round schools may be on a single-track or multi-track schedule. Single-track schedules call for an instructional year of 180 days with short breaks interspersed throughout. Multi-track schedules stagger the instructional and vacation/intercession periods of each track throughout the entire year, so some students are receiving instruction while others are on vacation. Perceived benefits for teachers include: improved pay or work schedules; facilitation of educational improvements; and enhancement of the climate of professionalism. Perceived challenges for teachers include: organizational issues (e.g., sharing classrooms and leadership of extracurricular activities with other teachers); continuing education (finding time to schedule professional development); and conflicts in personal scheduling (e.g., teachers' children attending school on different calendars than their parents). Typically, the more teachers are exposed to year-round education, the more they like it, but the process of changing to such a schedule can create stress for them until they have time to adapt. (Contains 20 references.) (SM)