ABSTRACT, ACADEMIC, ADHS, ADS, AID, ANALYSIS, ASSISTANCE, BACKDROP, BACKGROUND, BEROLD, BLACKBOARD, BOARD, BOOST, CHALK, CHE, CHILD, CHILDREN, CLASSROOM, COACHING, CONCEPT, DESIGN, DRAFT, EDUCATION, EDUCATIONAL, ELEMENTARY, ENROLLMENT, ERZIEHUNG, ESTABLISHMENT, FONT, GRADE, HELP, HOMEWORK, INSTITUTION, IQ, KIDS, LEARN, LEARNING, LEHRKRAFT, LERNSCHW, LERNSCHWAECHE, MATHEMATICS, MODEL, MOTIVATION, OF, PAPER, PARENTS, PICTOGRAM, PICTOGRAPH, PISA, PLAN, PRIMARY, PROJECT, PUPIL, RANDOLF, SCHOOL, SCHOOLS, SIGN, SIGNAL, STUDY, SUBJECT, SUPPORT, SYMBOL, TEACH, TEACHER, TEENAGER, TEENAGERS, TEENS, TIMETABLE, TRADE, TYPOGRAPHY, UNTERRICHT, WORK, WRITING, YEAR, YOUTH, ZEUGNIS,