This is a great tool. We used it with a novel we read with the class and also assigned the words on a spelling test. The kids write the word or words down the teacher says aloud. Next, the children rate themselves before discussing the word how well they know the word. ! would be they have no clue what the word means, 4 being they are experts on this said word. They then retrieve the definition for homework or classwork and draw a picture to represent the word and they rate themselves at the end and use which ever words with low ratings as a guide for what words to study for the test or quiz.