Only 3 of the 28 educators work in informal learning environments; most work in formal classroom settings. (agencybydesign.org)
A natural comparison would be to the estimated effects of different teacher professional - development programs (in - service training often delivered in formal classroom settings). (educationnext.org)
A midwife today must have a number of years of formal classroom training as well as practical training before she can be accredited and allowed to practice. (pregnancy-info.net)