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).
Replies to: top 15 most prestigious universities. I would put the following in the top 16: Harvard, Yale, Princeton, Stanford, MIT, Caltech, Columbia, Duke, Johns Hopkins, Brown, Dartmouth, Penn, Chicago, Northwestern, Berkeley, and Cornell. I would remove Chicago from the above list and replace it with Vanderbilt.