The development and application of a learning procedure for the seriation structure of children in the oscilatory state are described. The procedure was based on the structural genetic theory of learning. A study consisting of design and verification stages was carried out in Cali, Colombia. In the design stage six seriation treatments involving different materials (such as sticks, dolls and playdough) were developed and tested individually with seven children. Of the six designs, three were selected for use in the verification stage. In the verification stage, the learning procedure was applied individually to nine children attending the Nuestra Senora del Rosario school to verify its effect upon the development of the seriation structure. The complete procedure consisted of a pretest, three learning sessions and two posttests. A qualitative analysis of the children's behavior was emphasized in both stages of the study. In the verification stage the children's improvement in seriation ability was evaluated between pretest and posttest. The results showed a significant advance in most of the nine children. A summary in English is appended. (Author/RH)