This study re-evaluated 454 science projects that were prepared by primary school students between 2007 and 2011 within the scope of Science Projects Event for Primary School Students. Also, submitted to TUBITAK BIDEB Bursa regional science board by MNE regional work groups in accordance with scientific research methods and techniques, including also the related studies in the literature. In this evaluation, criteria that are particular but not limited to the determination of the problem was included. Originality and creativity, scientific method, consistency and contribution, usefulness, implementability, literature review and result, were taken as a basis. Within the scope of this study, theoretical and technical methods employed for evaluating the projects were focused on, and the fitness of the steps taken for evaluation was discussed. Furthermore, recommendations here put forward concerning the solution of the basic problems facing teachers and students during the design and implementation of these projects as well as the administration of methods.