LEARNING ABILITIES OF EDUCABLE MENTALLY HANDICAPPED CHILDREN WERE STUDIED OVER A 4-YEAR PERIOD. THE RESEARCH RESULTED IN THE DEVELOPMENT OF A SIX-PART REPORT. PART ONE, THE ACHIEVEMENT AND ADJUSTMENT OF EDUCABLE MENTALLY HANDICAPPED (EMH) CHILDREN, EMPLOYED THE MATCHED-PAIR METHOD WITH APPROXIMATELY 700 SAMPLES OF EMH CHILDREN, 7-13 YEARS OF AGE. THE RESULTS REVEALED THAT CHILDREN IN SPECIAL CLASSES RESPONDED BETTER AND HAD BETTER BEHAVIOR AND ADJUSTMENT PATTERNS THAN THOSE IN REGULAR CLASSES. PART TWO, TEACHING THE EMH CHILD, COMPARED FOUR METHODS OF INSTRUCTION. THE EXPERIMENT PLACED 50 EMH CLASSROOM TEACHERS INTO 5 INSTRUCTION GROUPS. THE RESULTS FROM TESTING THE GROUPS SHOWED THAT THE INTERESTS AND UNITS METHODS WERE NOT SUPERIOR TO THE SUBJECT-ORIENTED APPROACH. PART THREE, THE CHICAGO TEST OF GENERAL INFORMATION AND GENERAL COMPREHENSION FOR EMH CHILDREN, WAS DESIGNED TO MEASURE THE PROGRESS OF EMH CHILDREN IN GENERAL APTITUDE AREAS AND FORMULATED CURRICULAR OBJECTIVES. ITS CONSISTENCY COEFFICIENT OF 0.94 DISPLAYED THE RELIABILITY IN INDIVIDUAL DIAGNOSIS WHEN INTERRELATED WITH THE ETHICAL COMPREHENSION TEST (ECT). PART FOUR, PERSONALITY APPRAISAL OF EMH CHILDREN, DEVELOPED A SYSTEM OF ANALYZING PICTURE-STORY PROCEDURES. IT INCLUDED A NONINTERPETIVE SCHEMA, A NUMERICAL SUMMARY, AND THE ASSIGNMENT OF SCORES FOR PERSONALITY. PART FIVE, THE CHICAGO COOPERATIVE RESEARCH PRACTICAL READING TEST, WAS CONSTRUCTED TO DETERMINE THE READING PROGRESS OF THE EMH CHILD. THE RELIABILITY OF THIS TEST WAS APPROXIMATELY 0.767. INTERCORRELATIONS SUGGESTED THAT ACHIEVING EMH CHILDREN TENDED TO ACHIEVE CONSISTENTLY. PART SIX, A BRIEF SCREENING INSTRUMENT FOR EVALUATING THE ACADEMIC SKILLS AND PERSONAL ADJUSTMENT OF EMH CHILDREN, DEVELOPED FIVE TESTS AND MEASURING DEVICES. CONSTRUCTION, VALIDATION, AND RELIABILITY WERE REPORTED ON (1) THE WORD RECOGNITION TEST, (2) THE CHICAGO ADJUSTMENT RATING SCALES, (3) A BEHAVIOR CHECKLIST FOR THE PERSONALITY EVALUATION OF EMH CHILDREN, (4) SOCIOMETRIC QUESTIONS, AND (5) INTEREST MATURITY TESTS. (RS)