The eNLVM – Interactive Online Math Lessons is an NSF-funded project to extend and enhance the NLVM provides interactive online math lessons, activities, and assessments. Topics include the fractions, functions, geometric transformations, integer arithmetic, patterns and sequences, probability, right triangle trigonometry, slope, triangle geometry, and writing equations of lines. Calculate what an excavation company should charge for digging a hole. Analyze three pollution reduction plans. Determine the best rate for repaying a loan. (Utah State University, National Science Foundation)