This paper presents the progress of an ongoing research aimed at developing the number sense in third graders. Based on assessment results of a sample of elementary schools in the Municipality of Zapopan, Jalisco, Mexico, we investigate the problem of mathematics learning with a cognitive approach. The study identifies the student's weakness related to their abilities to conceptualize the meaning of the numbers and its relationships. We present the main ideas of pedagogical design of a serious game developed in Scratch 2.0 that enhances the ability to identify and build sequences. Preliminary results suggest the use of a webcam to increase student's interaction and improve their numerical abilities.

No abstract