This research has been developed with the purpose of determining the relationship of educational materials in blended teaching and learning of mathematics in children of the Initial Educational Institution N ° 733 - Caballococha 2022, The research is of a correlational type, with a design not experimental. For convenience, the population considered is 60 initial children. Observations were used as techniques and observation guides as tools to obtain data that were previously validated by expert judgment. concluded that there is a significant relationship between the educational materials in blended learning and the learning of mathematics in children of the Initial Educational Institution N ° 733 - Caballococha 2022 " In this reason, it is valid with the Pearson correlation coefficient (r) with a value of 0.002, which is high and direct.