Concrete is a mixture of cement, water, sand, gravel, crushed rock, or other aggregates. Sometimes, one or more admixtures are added to change certain characteristics of the concrete, such as workability, durability, and time of hardening.
Top 100 Colleges by Highest Tuition. Here are the top 100 most expensive colleges by tuition for the 2008-2009 school year. The latest numbers can be found in our most expensive colleges ranking. Notes: Some colleges like Bates College, Colby College, Middlebury College, and Union College have a comprehensive fee (tuition + room/board).
Since 2010, nine public college leaders have crossed the $1 million mark, some more than once, according to the Chronicle. E. Gordan Gee, former president of Ohio State University and now president at West Virginia University, is the highest paid in any year of the Chronicle survey, making more than $5 million in 2013.