00551nam a2200121Ia 4500 171212s9999 xx 000 0 und d 9780833094834 Opfer, V. Darleen;Kaufman, Julia H.;Thompson, Lindsey E. Opfer, V. Darleen;Kaufman, Julia H.;Thompson, Lindsey E. Implementation of K–12 State Standards for Mathematics and English Language Arts and Literacy Findings from the American Teacher Panel RAND Corporation 2016 Education http://jstor.org/stable/10.7249/j.ctt1d41d6t 352171 352171 0 0 0 CL CL 2017-12-12 0 2017-12-12 00:00:00 2017-12-12 CBE