Fourth, it is without question true that in so far as the habits fixed are "school habits" or "Sunday habits," or any other special type of habits, formed only in connection with special situations, to that extent we have no reason to expect moral conduct in the broader life situations. The habits formed are those that will be put into practice, and they are the only ones we are sure of. Because a child is truthful in school, prompt in attendance, polite to his teacher, and so on is no warrant that he will be the same on the playground or on the street. Because a child can think out a problem in history or mathematics is no warrant that he will therefore think out moral problems. The only sure way is to see to it that he forms many useful habits out of school as well as in, that he has opportunity to think out moral problems as well as problems in school subjects.[18] Fifth, individual differences must not be forgotten in moral training. Individual differences in suggestibility will influence the use of this factor in habit formation. Individual differences in power of appreciation will influence the formation of ideals. Differences in interest in books will result in differing degrees of knowledge. Differences in maturity will mean that certain children in a class are ready for facts concerning sex, labor and capital, crime, and so on, long before other children in the same class should have such knowledge. Differences in thinking power will determine efficiency in moral situations just as in others.