Special education teachers become knowledgeable about major concepts, principles, theories and research related to the normal progression and variations in special education students' physical, emotional and cognitive development to construct learning opportunities that support students with disabilities' development, acquisition of knowledge, and motivation. Special education teachers work with administrators and colleagues to explore work and progress of students with disabilities, to examine the effectiveness of instructional strategies, to identify school and program needs based on student data, and to ensure that the collective needs of the school are addressed.