We have a random control trial that shows strong evidence of effectiveness, and we even have a longitudinal study that shows our children's gains last into third and fourth grade, the highest grades the children had achieved at the time.
Realizamos una prueba de control aleatoria que demuestra la efectividad e incluso hicimos un estudio longitudinal que muestra que nuestros niños recuerdan lo aprendido hasta tercer o cuarto grado en nuestros mejores casos hasta hoy.