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Larger context for LACK in Corpus USbrown_UKbncw/US_brown.txt

  One study, which involved 1,524 pupils in grades one to six, found that 12 percent of the pupils were seriously maladjusted and that 23 percent were reading a year below capacity.   It is apparent, therefore, that the teacher needs to know what factors have a vital bearing on the learning and adjustment of children.   When a child fails to meet the standards of the school in his rate of learning, insecurity, unhappiness, and other forms of maladjustment frequently follow.   These maladjustments in turn inhibit learning, and a vicious cycle is completed.   lack >   It is easy for the teacher to rationalize that the child who is not achieving in accordance with his known ability is just plain lazy, or that the child who lack s interest in school, who dislikes the teacher, or who is overaggressive is a hopeless delinquent.     The causes of retardation and maladjustment may be found in physical factors, such as defective speech or hearing, impaired vision, faulty motor coordination, a frail constitution, chronic disease, malnutrition, and glandular malfunctioning.   They may be caused by poor health habits, such as faulty eating and sleeping habits.   lack >   They may be related to mental immaturity or lack  of aptitude for certain types of school work.     The curriculum may be too difficult for some and too easy for others.