As we outlined in our first article, the reliability and validity of classroom observation instruments depends on standardised protocols. (teachermagazine.com.au)
Validated classroom observation instruments such as Class - S out of the University of Virginia (Stuhlman, Hamre, Downer, & Pianta, 2014) devote many resources to ensuring that the observers who use their instrument are using it reliably. (teachermagazine.com.au)
With the help of three thousand teacher volunteers we've captured thousands of lessons on digital video and scored them using several different classroom observation instruments; collected student - achievement data on state tests and on more cognitively challenging supplemental assessments; and asked students to weigh in on the quality of their classroom experiences using the Tripod student survey developed by Harvard's Ron Ferguson. (gse.harvard.edu)