http:rtisuccessorg. Progress monitoring, one of the essential. components of Response to Intervention (RTI), is. characterized by repeated measurement of academic. performance that is conducted at least monthly. The. process may be used to assess studentsâ academic. performance over time, to quantify student rates of.
Calculating the Air Quality Index. The AQI is calculated by converting measured pollutant concentrations to a uniform index which is based upon peer-reviewed scientific evidence of the health effects associated with a pollutant.
1 The HHI is calculated by taking the market shares of the different firms in the market (the fraction of total market output that each of them sells), squaring them, and adding up the squared shares.  In a monopoly, one firm has a 100 percent share of the market, and so the HHI is (100)2 = 10,000.