1. Let’s put kids first, finally: getting class size right;Achilles,1999
2. Help seeking and intelligent tutoring systems: theoretical perspectives and a step towards theoretical integration;Aleven,2013
3. Investigations into help seeking and learning with a cognitive tutor;Aleven,2001
4. Help seeking and help design in interactive learning environments;Aleven;Review of Educational Research,2003
5. Cognitive tutors: lessons learned;Anderson;The Journal of the Learning Sciences,1995