“…About one-fourth of the researcher-driven interventions did not measure fidelity [52,53,63,64,67,69,72,76,82,84], and of those that measured it, about half studies reported that the intervention was delivered as intended [50,51,58,61,62,65,68,70,74,80,81,83,85]. The measures used for fidelity varied between teacher logs [54-56, 58, 73, 75, 77], direct observation [51,57,65,68,74], activity monitors [62,70,80], meetings or ending surveys [60,86], or a combination of measures [50,59,61,66,78,79].…”