From "Carol Dweck Says Theory of Educational Mind-Set Is Often Misunderstood" by Goldie Blumenstyk (Chronicle of Higher Education). See more at the Chronicle site (subscription required) or at the Soundcloud podcast. For more cats inspired by Carol Dweck's writings and talks, see the Dweck Collection.
Other people go on a praise-the-effort craze. Effort is part of building your abilities, but I find now that many educators are praising effort that’s not effective.
Make sure your effort is effective.