There were several research projects conducted by the PACT Center to utilize Cognitive tutor for courses in Excel and to develop an intelligent tutoring system for algebra expression writing, called "Ms. Lindquist". Initially used by thousands of students, the aim of the Ms. Lindquist program was to have a tutor that could carry on running conversations with a student, with the intent of providing a more human connection. Further, in 2005, Carnegie Learning released "Bridge to Algebra", a product intended for middle schools that was piloted in over 100 schools.