This article intends to introduce an e-portfolio system to help mentors assess the teacher candidates' performances and products in a large scale open and distance learning teacher training program. The Pre-School Teacher Training Program (PSTTP) of Anadolu University is a completely distance program that helps around 12.000 students get the required pre-service training to be able to apply for working at schools as teachers. This article focuses on design, implementation, management and evaluation of the e-portfolio system for PSTTP. In e-portfolio system, it is expected that the managerial decisions (i.e. program/course design and selection, technology selection, teaching method selection, so on.) are effective and efficient in many stages. Change in managerial understanding and structuring is required to improve the e-counseling system, one of the corner stones of e-portfolio implementation. In parallel with all these expectations and goals, developing and spreading the e-portfolio implementations which require constant evaluation and analysis of drawbacks and advantages will contribute to the structuring of the assessment process in distance education providing a more functional, active and faster participation. (Contains 3 figures.)