Concept questions are used to find out if a learner has understood a new item. The question is designed to test the key concepts of the item and normally requires a yes/no or short answer.
To test understanding of the use of 'used to' in the example 'I used to swim in the summer', a teacher might ask 'Do I still swim now?' and 'Did I only swim once?' to test understanding of 'used to' as a finished and repeated action in the past.
In the classroom
When planning a presentation lesson on a new language point, many teachers prepare a series of concept questions that will fully test understanding of the new language.