An annotated bibliography is the third concluding portion of this three-part progress report on IPI. Part I documents progress and findings up to September 1969 with the aid of a flow chart of the system, a table of behavioral objectives for the mathematics continuum 1969-70, a brief historical table (1954-66) of progress from research to IPI through Federal support, models for evaluation of IPI and for its wide-scale adoption; a map showing the number of IPI schools by state (1960-70), tables showing math field participating schools by year and elementary school developmental efforts. IPI results of work to date are recorded according to how IPI affects pupil achievement and attitudes, teacher attitudes and changes, and administrators. A description of IPI as a developmental instructional system concludes this part of the report. The second part is concerned with formative and interim summative evaluations. In the formative evaluation activities are classified as pupil-oriented, personnel-oriented, or system-oriented, and under each classification are details concerning authors, titles and dates of published investigations, the populations and instruments that contributed to the researches, and their descriptions and results. The interim summative evaluation proceeds in like manner. (GO)