The authors describe an extension that has been made to and subsequently incorporated into the system known as Teacher Cost Models. This approach -- a dollar flow analysis -- identifies and quantifies the factors that contribute to dollar changes in the ON GRID teacher wage-bill from one year to the next. The methodology is applicable at both the county board and the provincial levels. Decisionmakers are provided with a detailed breakdown of teacher costs as they have evolved in the past and as they are likely to develop in the immediate future. This capability to quantify the dynamics of teacher costs should be of particular interest to school board salary negotiators for elementary and secondary school systems. (Author)