THIS REPORT EXPLORES PLANS OF ELEMENTARY AND SECONDARY SCHOOL ORGANIZATION BASED UPON THE LENGTHENING OF THE SCHOOL YEAR TO REDUCE BY ONE OR MORE YEARS THE TOTAL PERIOD OF SCHOOLING. PRACTICAL INFORMATION IS PRESENTED CONCERNING (1) THE CONTINUOUS SCHOOL YEAR PLAN, (2) THE TRIMESTER PLAN, (3) THE QUADRIMESTER PLAN, (4) THE MODIFIED SUMMER SCHOOL PLAN, AND (5) THE EXTENDED K TO 12 PLAN. THE EFFECTS OF EACH PLAN UPON STUDENTS, TEACHERS, SCHOOL FACILITIES, SCHOOL FINANCE, AND CURRICULUM ARE DISCUSSED. LONG-RUN FINANCIAL BENEFITS ARE EXPECTED TO ACCRUE FROM SAVINGS IN SALARIES, TRANSPORTATION COSTS, CAPITAL OUTLAY, DEBT SERVICE, AND BUILDING OPERATION COSTS WHILE REVENUES SHOULD INCREASE FROM RELATIVELY LARGER TAX ROLLS. POTENTIAL EDUCATIONAL ADVANTAGES ARISE FROM (1) REDUCTION IN THE NUMBER OF DROPOUTS, (2) SMALLER CLASS SIZE, (3) MORE INSTRUCTIONAL TIME TO MEET THE BASIC NEEDS OF EACH CHILD WITHOUT ADDITIONAL COST, (4) MORE EFFECTIVE UTILIZATION OF SPECIAL FACILITIES, (5) REDUCTION OF THE GAP BETWEEN TEACHER DEMAND AND TEACHER SUPPLY, AND (6) INCREASED TEACHER QUALITY RESULTING FROM THE ABILITY TO PAY HIGHER SALARIES AND THUS TO COMPETE EFFECTIVELY FOR QUALIFIED INDIVIDUALS. REQUIRED CURRICULUM ADJUSTMENTS TO MAKE SUCH PLANS EFFECTIVE ARE DISCUSSED IN DETAIL. EA 001 378 IS A RELATED DOCUMENT. (TT)