Even as the Common Core State Standards are being put into practice across most of the country, nearly half of teachers feel unprepared to teach them, especially to disadvantaged students, according to a new survey. The study by the EPE Research Center found deep wells of concern among teachers about their readiness to meet the challenges posed by the common core in English/language arts and mathematics. More than two-thirds said they were not well enough prepared to teach the standards to English-language learners or students with disabilities. More than half said they were not yet ready to teach them to low-income students or those considered at risk of academic failure.