WatchKnowLearn ratings are intentionally harsher than what you might find on YouTube, for example. Most of our videos have been imported by people who want to use them with kids, not by the creators of the videos. We take a hard-nosed attitude toward quality. Four and five stars should be reserved for really excellent quality. Three stars isn't bad. Two is often watchable and shouldn't be ruled out.

• 5 stars = Exemplary.
  Unusually helpful and well produced. Do not overuse this, please; it is not the standard rating for decent work, as it is elsewhere.
• 4 stars = Very Good.
  Very helpful but not among the very best; adequately produced, at least.
• 3 stars = Usable.
  Reasonably helpful, perhaps a bit amateurish in production or has some other problem; there is nothing wrong with a 3-star rating for amateur work!
• 2 stars = Some Merit.
  Minimally helpful; not completely worthless or inappropriate; you can see how it might be useful to some people.
• 1 star = Not Right for WatchKnowLearn.
  Not at all helpful, not educational, poorest quality, etc.; you can't see it being useful to anyone.

More help with rating