A PROGRAMED INSTRUCTION UNIT WHICH USED PICTORIAL AND SIMULATION TECHNIQUES WAS DEVELOPED TO TEACH STUDENTS HOW TO USE THE CARD CATALOG. ITEMS INVOLVED IN THE UNIT INCLUDED A PROGRAMED TEXTBOOK, A SPECIAL CARD CATALOG, AND A PRACTICE SET OF BOOKS. SUBJECTS WERE STUDENTS FROM GRADES 3, 4, AND 5 WHO WERE DIVIDED INTO AN EXPERIMENTAL AND A CONTROL GROUP. ALL SUBJECTS WERE PRETESTED ON SUCH ITEMS AS (1) LOCATION OF THE AUTHOR'S NAME, (2) USE OF THE CALL NUMBER, (3) SHELVING OF BOOKS, (4) FILING OF ABBREVIATED TITLES, AND (5) PREPARING A SIMULATED CARD. UPON COMPLETION OF THE ACTIVITIES, ALL SUBJECTS WERE PERFORMANCE TESTED AND POST-TESTED WITH A REARRANGED VERSION OF THE PRETEST. PERFORMANCE SCORES WERE NOT AS EXPECTED. NO SIGNIFICANT DIFFERENCES WERE FOUND BETWEEN THE GROUPS FOR PERFORMANCE TIME OR SCORE. THE RESULTS INDICATED SEVERAL NEEDED CHANGES--(1) THE WRITTEN TEST SHOULD BE MADE MORE RELIABLE, (2) ADJUNCT PROGRAMS ON SEARCHING FILE TRAYS AND LIBRARY SHELVES WERE NEEDED, (3) THE PERFORMANCE TEST NEEDS REFINEMENT OF TIMING TO SUIT THE AGE LEVEL OF THE STUDENTS, AND (4) THE LOCATION OF BOOKS IN THE LIBRARY SHOULD BE TAUGHT ALONG WITH THE PROGRAM. (AL)