This report presents the Idaho edition of the National Council on Teacher Quality's 2008 "State Teacher Policy Yearbook." The 2008 "Yearbook" focuses on how state policies impact the retention of effective new teachers. This policy evaluation is broken down into three areas that encompass 15 goals. Broadly, these goals examine the impact of state policy on 1) identifying effective teachers, 2) retaining those deemed effective and 3) exiting those deemed ineffective. While Idaho is making progress toward meeting a few goals, it lags behind other states in most other goals. The state completely missed eight goals, met a small portion of three, partially met three and fully met one. Idaho's best performance is in its requirement of multiple formal evaluations for new teachers. Remaining work includes requiring instructional effectiveness in teacher evaluations, making tenure decisions meaningful, articulating consequences for teachers with unsatisfactory evaluations and strengthening policies regarding teacher compensation issues. Idaho's progress toward meeting these goals is summarized. The body of the report provides a more detailed breakdown of the state's strengths and weaknesses in each area. Idaho has an overall performance of D- for 2008. Goals for each area are appended. (Contains 57 figures.) [Additional support for the 2008 "State Teacher Policy Yearbook" was provided by the Teaching Commission. For the national summary, see ED514690.]