Grading teachers

Los Angeles Unified officials Tuesday unveiled a new way to measure the success of teachers and principals, releasing their own version of the controversial value-added method of analyzing test scores.Connie Llanos in the Daily News.

The academic-growth-over-time formula looks at how much students improve year-to-year, based on how they have done in the past.

It then predicts how each student should do, based on factors like socioeconomic status or special needs, to gauge a teacher's effectiveness.