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The 1996 National Education Science Standards (NSES) in the U.S. provide descriptions of needed reforms for K-16 science teaching and improvements regarding indications of student learning. The goals indicate specifically the changes needed in teaching and improved ways for assessing student learning. This paper discusses how teaching and student assessment have changed the professional development and ways of accomplishing better learning with students. The emphasis is on teacher preparation and continuing work with in-service teachers which has improved U.S. teachers. It is important to note how such changes can provide additional evidence for accomplishments while also encouraging additional changes.