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).
States with solid aggregate showings â a high percentage of both high school graduates and college graduates â include New Hampshire, Vermont, Colorado, Massachusetts, Connecticut, Maryland and New Jersey. States in the south largely populate the bottom of the list on both measures. Louisiana comes in at 48th for high school and 47th for college; Arkansas at 44th and 50th; West Virginia at 45th and 51st; Alabama at 46th for both; Kentucky at 47th and 48th; and Mississippi at 51st and 49th.