What are Knowledge Levels and how do they work in Review?

Babbel’s Review feature is based on the proven method of spaced repetition, and this is used in our product via Knowledge Levels. These levels tell Review which stage of the process you’re at with a piece of vocabulary, and you’ll see an item more or less often depending on its level. 


How many levels are there?

There are six levels in total, with Level 1 being a completely new piece of vocabulary, and Level 6 is when it’s in your long-term memory. Each time you review something correctly, it moves up to the next level. Here’s the detailed breakdown:

  • If you get something correct, the word or phrase moves up one level and becomes due again in 4 to 180 days (depending on the new level)
  • If you make one mistake, the item stays at the same level and becomes due again the next day
  • If you make more than one mistake, the word or phrase moves down a level and becomes due again immediately

In short, words and phrases that come easily to you will end up at a higher level and need to be reviewed less. Items you have more difficulty with will have to be reviewed more often until they make it into your long-term memory.

Note: Review works on the principle of Knowledge Levels on desktop and in the app, but you can only see and change an item’s level on desktop.

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