Several different processes of varying effectiveness can be used to purify air. 1  Thermodynamic sterilization (TSS) - This technology uses heat sterilization via a ceramic core with micro capillaries, which are heated to 200 Â°C (392 Â°F).
What is Common Core? The Common Core State Standards Initiative is a state-led effort that established a single set of educational standards for kindergarten through 12th grade in English language arts and mathematics.
The Common Core State Standards aim to raise student achievement by standardizing what's taught in schools across the United States, but have sparked controversy among educators, parents and politicians. U.S. News & World Report offers insight and analysis about the issues. The History of Common Core State Standards.