1. National Governors Association 2010. Common core state standards. Washington , DC ( 2010 ). National Governors Association 2010. Common core state standards. Washington, DC (2010).
2. Wheel-Spinning: Students Who Fail to Master a Skill
3. John Seely Brown and Richard R Burton . 1978. Diagnostic models for procedural bugs in basic mathematical skills. Cognitive science 2, 2 ( 1978 ), 155–192. John Seely Brown and Richard R Burton. 1978. Diagnostic models for procedural bugs in basic mathematical skills. Cognitive science 2, 2 (1978), 155–192.
4. John Seely Brown and Kurt VanLehn . 1980. Repair theory: A generative theory of bugs in procedural skills. Cognitive science 4, 4 ( 1980 ), 379–426. John Seely Brown and Kurt VanLehn. 1980. Repair theory: A generative theory of bugs in procedural skills. Cognitive science 4, 4 (1980), 379–426.
5. Richard R Burton. 1982. Diagnosing bugs in a simple procedural skill. Intellinget Tutoring Systems(1982) 157–184. Richard R Burton. 1982. Diagnosing bugs in a simple procedural skill. Intellinget Tutoring Systems(1982) 157–184.