The research deals with the analysis of efficiency of teaching techniques with the use of the social dimension of Web 2.0 within the English for Specific Purposes course in pre-school and primary teacher education that would help students to become more cognizant and more responsive to the emerging needs of the market for educational services and to promote use of the social dimension of Web 2.0 by pre-school and primary student teachers. The paper introduces the study conducted in Latvia in 2008-2009. The conducted explorative research comprises four stages. The sample involved 47 pre-school and primary student teachers and revealed that teaching techniques with the use of the social dimension of Web 2.0 are efficient if peer-learning is emphasized to provide student's personal experience in use of the social dimension of Web 2.0 as a condition for creation of new knowledge. (Contains 5 figures.)