One of the main goals of No Child Left Behind (NCLB) is to ensure that all students reach proficiency in the challenging state academic standards in reading, science, and mathematics. To ensure that no students are left behind, NCLB requires that states must show that their students are making improvements, also known as annual yearly progress (AYP). The "proof" of success, or AYP, is measured through high-stakes assessments in which all students are required to participate in, and in some cases, must pass in order to receive a high school diploma. Based on these results teachers and schools are then to be "held accountable" for their students achievements.The federal NCLB law, which went into effect in 2002, has resulted in great controversy over whether a teacher should be focused on teaching simply to get the best results on the test or focused on the process and methods of learning. With their jobs at stake, teachers and schools are now focusing a lot of attention on state standardized testing and results. In order to insure that their students can pass these assessments, teachers often "teach the test." When this happens, what is not tested is not taught. Students may miss out on current events or important life skills and concepts simply because they are not on the test. They may also become "left behind" with developing their creativity, problem solving skills and critical thinking skills.