Formative Assessment: When the Cook Tastes the Soup....

Ever have a problem differentiating between the definitions of formative and summative assessments? Well thanks to Debra Dirksen in her article "Hitting the Reset Button: Using Formative Assessments to Guide Instruction," she offers the following image from the work of Robert Stake (Scriven 1991:169):

 "When the cook tastes the soup, that's formative: When the guests taste the soup, that's summative." 

"As the cook, or teacher, we need to stop and taste the soup before we move forward with instruction. We need to design instruction so students can press the reset button and go back to learn what they missed the first time. We can use many techniques to assess student achievement and understanding."

This is a powerful image that clearly delineates between the two concepts and helps to cement them into the mind. It's also reminds us of the power of using metaphors, similes, images and figurative language in our teaching practices.