| 20, 20-30, 25, 25-30, 30-40, adult, adult person, age, age bracket, age class, age group, anciently, ancients, clerical error, clerical mistake, communicate, communication, contemplative, count, course, decide, defect, descision, economy, educate, education, education policy, error, executive, female, feminine, figure, folk, gender, general education, German, grammar, homework, homeworks, human, humanely, instruction, interact, interaction, job, justice, language, learn, learner, learning, learns, level of education, mankind, misspelling, mistake in writing, new, notation, number, occupation, old, orthographic, orthography, people, person, Pisa study, population, precepts, reform, reformation, reformations, regularize, regulated, reorganization, rule, rules, school, school class, school education, school reform, school system, schooling |