The Race To The Top (RTTP) federal education policy fostered a new generation of state tests. This policy advocated adopting common core standards which set a higher level of learning targets for students in the US K?12 education. These standards are intended to assess higher order thinking skills and prepare students ready for college and career. In the meantime, they are aligned with those for international assessments which keep US students abreast of their international peers. Furthermore, the new generation of state tests requires the use of technology enhanced items to align student assessments with student learning environment. Computer technology is indispensable to accomplish this goal. Computer based tests related to common core standards are different from previous state computer based tests in two important aspects, one is that the current version requires accurate assessment of students along all ability levels and the other is that it promotes the use of an efficient test delivery system, essentially the use of computerized adaptive assessment in K?12 state testing programs. In addition to providing summative information about student learning, the new common core tests add formative assessment component in the whole assessment system to provide timely feedback to students and teachers during the process of student learning and teacher instruction. As with its predecessor, the new assessment policy also holds teachers and schools accountable for student learning