This book contains: 1) An overview and philosophy of Harmony in Sequence. 2) 50 Choral Octavos listed in Harmonic Sequence. 3) 275 suggested choral repertoire songs for developing part singing. 4) Over 100 pages of reproducible sight reading, theory, and vocabulary worksheets. 5) Folk song arrangements for part singing and sight reading. 6) Review & Evaluation materials for Beginning and Intermediate level singers including vocabulary reviews, tests, social activities, and flash cards. The Indianapolis Children's Choir uses these materials for beginning and intermediate level singers in grades 4 - 7. Developed by Ruth E. Dwyer, Director of Education Emerita of the ICC