Nuffield Combined Science, a program prepared for the first two years of British secondary schools, is described in SE 015 449 and SE 015 451. Teachers' Guide III contains a series of alphabetically arranged "hints" on laboratory and pedagogic techniques, details of apparatus and materials necessary for each exercise suggested in each of the 10 sections contained in Teachers' Guides I and II, a catalogue of appropriate teaching aids (together with British sources), instructions for the construction of some apparatus in the school, and an appendix discussing the treatment of the necessary mathematical skills in science classes. These sections, particularly "hints," are referenced in the text of Teachers' Guides I and II. (AL)