While high-end evaluationmethods like randomized control trials (RCTs) are the surest means of determining what interventions in fact cause certain outcomes, they are also time-consuming and costly and beyond the means of many, if not most, mainstream nonprofits.
The systematic evaluation of promising methods and attracting skilled teachers into the early years could save billions of pounds and enhance the outcomes of children in future years.
Hazard evaluation can be fast and safe by using remote methods such as digital photogrammetry, using software for image processing of scanned aerial photographs.