This issue brief uses data from the TIMSS 1995 and TIMSS 1999 surveys to examine the degree of teacher familiarity with various standards and assessments in 1995 and 1999. It then compares teacher reports of their instructional practices in classrooms with teacher reports of their familiarity with standards and assessments. The analysis shows that teacher awareness of state curriculum guides and state assessments increased between 1995 and 1999. In addition, the Brief provides modest support for the existence of a relationship between familiarity with policy instruments and teacher practices.