This teacher's guide includes parts one and two of the four-part third year Portland Project, a three-year integrated secondary science curriculum sequence. The Harvard Project Physics textbook is used for reading assignments for part one. Assignments relate to waves, light, electricity, magnetic fields, Faraday and the electrical age, electromagnetic radiation, the chemical basis of atomic theory, electrons and quanta, the Rutherford-Bohr model of the atom, and modern physical theories. The Chemical Education Materials Study (CHEMS) textbook is used for reading assignments for part two with assignments relating to many-electron atoms, ionization energy and the Periodic Table, molecules in the gas phase, and bonding in solids and liquids. The guide also contains entries on optics dealing with reflection, refraction, and images; and an extensive discussion of the electron structure and related quantum properties of the orbital model of the atom. A review of the development of the three-year program, a discussion of its rationale and the content of each of the three courses, and a three-year course subject outline are included in this volume, as well as notes to the teacher, examples of data, and problem calculations. (Author/SL)