Christine Willig, President of McGraw-Hill Education, said:

There’s a difference between educational technology – a single video, a single interactive, a single app – and learning science, in which we’re investing in the small pieces of data that show us where a child is at in their learning trajectory, feeding them content in a way that’s powerful and effective for them to move to the next level. 

via https://www.youtube.com/watch?v=NYR47-XJq64#t=01m55s