Worked Examples with Self-Explanation in Algebra I

Worked Examples with Self-Explanation in Algebra I is an intervention designed to improve conceptual understanding and procedural skill in solving two-step linear equations for high school and middle school students taking Algebra I. The intervention is embedded within the Algebra I Cognitive Tutor software, where students work individually on computers during scheduled lab sessions. Students receive 8-12 worked examples (either correct, incorrect, or a combination) interspersed throughout their guided practice problems. Each example shows an equation-solving step, and students must explain both what was done and why it was correct or incorrect by selecting sentence fragments from drop-down menus. The examples target common student misconceptions about equation features (equals signs, negative signs, like terms). Students receive immediate feedback and hints as they construct their explanations. The intervention replaces some practice problems with examples but maintains the same overall learning objectives. Teachers do not need special training beyond familiarity with the Cognitive Tutor system, as the intervention is delivered entirely through the software.