PREPARED AS PART OF "PROJECT IMPROVING AND EXTENDING THE JUNIOR HIGH SCHOOL ORCHESTRA REPERTORY," THIS VOLUME CONTAINS CURRICULAR MATERIALS REPRESENTING THE 20TH CENTURY PERIOD. A MUSICAL HISTORY OF THE PERIOD IS GIVEN, AS WELL AS HISTORIES OF THE COMPOSERS AND THEIR INDIVIDUAL COMPOSITIONS. THE MATERIALS ARE PREPARED FOR 3 DEGREES OF TECHNICAL CHALLENGE--EASY, MODERATE, AND DIFFICULT. SIXTEEN SELECTIONS REPRESENT THE WORKS OF VAUGHAN WILLIAMS, BARTOK, STRAUSS, WALTON, COPLAND, DEBUSSY, DE FALLA, GIANNINI, MENOTTI, KABALEVSKY, STRAVINSKY, VILLA LOBOS, AND RAVEL. RELATED REPORTS ARE RC 002 306, RC 002 307, RC 002 308, AND RC 002 309. (BR)