These print-and-go or digital problems ask students to solve a problem, find the error, explain the error and therefore decide who was correct! Each problem targets a misconception in mathematical thinking. By identifying and explaining the error, the misconceptions second graders often have should be addressed and rectified. This resource is broken down by strand. Operations and Algebraic Thinking - 10 problemsNumbers and Operations in Base Ten - 22 problemsMeasurement and Data - 20 problemsGeo