THE THIRD YEAR OF ARITHMETIC INSTRUCTION SHOULD UTILIZE SOCIAL SETTINGS FOR LEARNING AS WELL AS MANIPULATIVE AND GRAPHIC MATERIALS. THE NUMBER SYSTEM, IN COUNTING, SHOULD DEVELOP THE SKILLS OF COUNTING BY 3'S AND 4'S AND OF RECOGNIZING ODD AND EVEN NUMBERS. CHILDREN SHOULD GAIN THE ABILITY TO READ AND WRITE NUMBERS TO FOUR PLACES. THE WHOLE NUMBERS UNIT SHOULD PROVIDE REVIEW AND DRILL OF ADDITION AND SUBTRACTION UP TO 18 AS WELL AS TEACHING ZERO COMBINATIONS, COLUMN ADDITION, AND BORROWING AND SUBTRACTION. MULTIPLICATION AND DIVISION WORK SHOULD BE EXTENDED TO ZERO COMBINATIONS, MULTIPLYING TWO-PLACE NUMBERS, AND DIVIDING TENS AND ONES BY A ONE-PLACE DIVISOR. MONEY SHOULD BE USED TO TEACH THE DECIMAL FORM. FRACTIONS SHOULD DEVELOP THE IDEA OF DIVISION AND PARTS OF A GROUP. MEASUREMENT SHOULD EMPHASIZE PARTS OF THE DAY, USE OF THE CALENDAR, LINEAR MEASURE, LIQUID MEASURE, WEIGHT, THERMOMETER, AND GRAPHS. THE GEOMETRIC FORMS OF THE CIRCLE, SQUARE, TRIANGLE, RECTANGLE, SEMICIRCLE, CUBE, SPHERE, AND HEMISPHERE SHOULD BE REINFORCED. SPECIFIC TEACHING APPROACHES ARE SUGGESTED IN OUTLINE FORM. MATERIALS ARE TO BE USED WITH THE GUIDE, "ARITHMETIC PROGRAM PRIMARY UNIT," PHILADELPHIA PUBLIC SCHOOLS (1963).