WITHIN-DAY VARIABILITY IN THE QUALITY OF CLASSROOM INTERACTIONS DURING THIRD AND FIFTH GRADE. - Curby, Timothy W.; Stuhlman, Megan; Grimm, Kevin; Mashburn, Andrew; Chomat-Mooney, Lia; Downer, Jason; Hamre, Bridget; Pianta, Robert C. (NBER International Seminar on Macroeconomics, 2010)