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In the late 1940s and 1950s , African American attempts to move out of " arbitrarily restricted areas " produced what historian Arnold Hirsch called " an era of hidden violence , " as whites in city and suburban neighborhoods met breaches in the color line with a guerrilla war of death threats , property destruction , and physical violence . Written for beginning students training for careers in child care / early childhood programs , this book provides an overview of the development of children examined from three aspects : cognitive domain , affective domain , and physical and motor domain . We are also committed to promoting children 's self-awareness , competence , self-worth , resiliency , and physical well-being . They explained the possibility of accessing additional resources through special education and related services , such as remedial academic instruction , assistive technology , and physical therapy . Whitbeck and Hoyt ( 1999 ) confirmed the existence of high rates of family disorganization , ineffective parenting , and physical and / or sexual abuse among homeless youth .