THIS WORKBOOK WAS DEVELOPED IN A CURRICULUM PROJECT, DESCRIBED IN VT 004 454 TO HELP JUNIOR HIGH SCHOOL STUDENTS LEARN BASIC PRINCIPLES AND CONCEPTS OF MECHANICS AND TECHNOLOGY BY MEANS OF A SERIES OF APTITUDE TRAINING EXERCISES. THE EXERCISES ARE SIMILAR TO APTITUDE TESTS EXCEPT THAT AN EXPLANATION OF THE UNDERLYING PRINCIPLE AND THE CORRECT ANSWERS ARE PROVIDED. IT IS THE FIRST OF FOUR BOOKS WHICH CONTAIN 30 EXERCISES TO BE PRESENTED IN 30 CLASS PERIODS. THE TEXT WAS WRITTEN AT THE SIXTH GRADE LEVEL. THE SIX EXERCISES IN THIS PART COVER ABSTRACT REASONING AND TWO- AND THREE-DIMENSIONAL VISUALIZATION PROBLEMS SIMILAR TO THOSE FOUND ON APTITUDE TESTS. ANSWERS ARE PROVIDED FOR EACH EXERCISE. OTHER RELATED DOCUMENTS ARE VT 004 455 AND VT 004 471. (EM)