The Measures of Effective Teaching Extension (MET Extension) tag scheme was developed during the first half of 2012 and tested during a two week pilot program in August 2012 and throughout fall 2012.
The scheme includes six English language arts (ELA) forms and seven mathematics forms. Each form contains between eight and twelve tag items. TeachingWorks subject matter experts created written descriptions for each tag item with bulleted ‘examples’ and ‘what this tag is not’ text.
Taggers completed training on a selection of tags/tag forms using master scored videos with explanations from master taggers to guide their learning.