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).
Best Answer: Im not sure about the highest but the highest i ever had was. 5.8 on a 4.0 scale. This was made possible from AP classes and perfect grades. So as far as I know thats as high as was possible at my school, however I'm not 100% sure of that!