ASSISTments
is a free, university-based platform. Each day, teachers assign problems to thousands of students (currently 50,000
students) through problem sets aligned
to the Common Core State Standards. Randomized controlled experiments are often
embedded in these problem sets to evaluate the efficacy of
learning interventions. Heffernan has been funded by the NSF to conduct certain
types of research using ASSISTments (i.e., spacing studies). Seventeen peer-reviewed publications have resulted
from controlled experiments conducted within ASSISTments.