The present study is constituted by a part of an extensive Study conducted in Ankara Tevfik Fikret Elementary School. In the scope of the study, layered curriculum, in which learners take their own learning responsibility, was used. It was expected that students would complete their freely selected learning tasks that were based on layered Curriculum. The relationship between learners' scores gained as the result of efforts exhibited in individual learning tasks and learners' mental skills and cognitive activity pace was tested. In this manner, learners' mental skills and cognitive activity pace were measured by Raven Standard Progressive Matrices Tests. In order to test the relationship between learners' learning tasks' scores and learners' mental skills and cognitive activity pace, Spearman's rank-order correlation coefficient was used.