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.
The calculation steps are as follows: 1  Calculate the average (mean) price for the number of periods or observations. 2  Determine each period's deviation (close less average price). 3  Square each period's deviation.  Sum the squared 1  deviations. Divide this sum by the number of observations.