Reblogged from Education Matters
VAM stands for Value Added Model and it is used to evaluate the state’s teachers. Below is the formula.
y_i=μ+∑_(g=1)^M▒〖δ_g x_g 〗+∑_(j=1)^K▒〖β_j x_j+θ_(k)i+ω_(mk)i+ε_i; 〗
The use of VAM by the way has been widely panned by both education and statistics experts. No other profession would be treated so shabbily.