Hello English Efficacy Study

The Hello English (HE) efficacy study was independently conducted by ROUMEN VESSELINOV and JOHN GREGO, from September, 2016 to January, 2017. ROUMEN VESSELINOV has a PhD. in Economics from Queens College, City University of New York.  JOHN GREGO has a PhD. in Statistics from University of South Carolina. This study was funded by the Central Square Foundation, […]