(Danielson defined a bottom 1 rating of unsatisfactory as doing harm to children, which is why Sue Sporte predicts this system may not easily weed out weak instructors.) (hechingerreport.org)
The study shows that schools considered high - poverty have a larger percentage of unsatisfactory rated teachers. (studentsfirstny.org)
Have you tried this experiment and found the result unsatisfactory in some way? (perfecthealthdiet.com)