01029nam a2200217Ia 450000100070000000500170000700800410002404000100006508200240007510000360009924501390013526001800027430000410045449000360049550000640053150000170059550400510061265000670066370000280073071000530075825234820160527190149.0011102e1999    dcu    gr     000 0 eng d  aPUCPR00221a507.1073bO858s1 aO'Sullivan, Christine Y.2Local10aStudent work and teacher practices in scienceba report on what students know and can docChristine Y. O'Sullivan and Andrew R. Weiss.  aWashington, DCbU.S. Dept. of Education, Office of Educational Research and ImprovementaJessup, MDbEducation Publications Center, U.S. Dept. of Education (distributorc1999.  aii, 384 p.bill. (some col.)c28 cm. 4aThe Nation's report card2Local  aAt head of title: National Center for Educaiton Statistics.  a"July 1999."  aIncludes bibliographical references and index. 0aSciencexStudy and teachingzUnited StatesxEvaluation.2Local1 aWeiss, Andrew R.2Local2 aNational Center for Education Statistics.2Local