Ms. Lindquist:The Algebra Tutor
Ms. Lindquist is a tool where students can get extra help learning how to write algebra expressions for word problems. (National Science Foundation)
The Free,Web-Delivered,Patented (U.S. Patent No. 6,634,887) Intelligent Tutoring System For Tutoring Students In Writing Expressions For Algebra Word Problems That Has Tutored Thousands of Students! written by Neil Heffernan at Carnegie Mellon University