@jacbalen @brianweishar @LiteracyOn http://bit.ly/2FZLv9l Notice the largest effect sizes are on research created materials.
In reply to https://twitter.com/jacbalen/status/976447314700193793
@jacbalen @brianweishar @LiteracyOn http://bit.ly/2FZLv9l Notice the largest effect sizes are on research created materials.
By Greg McVerry · Permalink · Original tweet
