The first three years of the SURWEB project were devoted to developing the infrastructure, procedures and learning tools necessary for full implementation of SURWEB.  In the last two years of the project a sufficient threshold of users was in place so that the effects of the SURWEB intervention on learning could be studied on a broader scale.  Between 1999 and 2000, four studies were conducted to measure the effect of SURWEB student achievement.  The results inform two broad domains of study related to student achievement: 1) the uses of SURWEB for knowledge and skill acquisition and 2) student access and use of learning technologies, including SURWEB.