The National Assessment of Educational Progress (NAEP) administered the selected supplemental mathematics exercises to 13-year-old students during October and November 1975 and to 17-year-old students during March and April 1976. This assessment represents a specially modified supplement to 1972-73 full-scale mathematics assessment and was designed to determine whether 13- and 17-year-old students can successfully cope with basic computations, operations, simple graphs and charts, symbols, situation (word) problems, etc. Of the 88 exercise parts administered to 13-year-olds, 61 have been released; and of the 83 exercise parts administered to 17-year-old students, 65 have been released. Only the released exercises are presented in this volume. Each released exercise or exercise part is accompanied by a documentation page that identifies the exercise content and objective and its National Assessment identification number. The documentation page also gives the exercise release number and various administrative information. The data table at the bottom of each documentation page or on the following page presents the 1975-76 results for the correct answer to the exercise part shown in this volume. (Author/MK) Primary type of information provided by report: Assessment Instrument (Released Exercises); Results (Exercise Level).