The objective of this study is to know the impressions of a sample of students of the third course of Secondary Education (14-15 years old) who have used the Jigsaw II technique to work mathematical contents through project-based learning with contexts of everyday life. For this purpose, base groups and expert groups have been established from each content block, arithmetics, measurement, geometry, statistics and probability. The results obtained have been satisfying and represent a starting point for interdisciplinary collaborative work in the mathematics classrooms. © 2020 Nova Science Publishers, Inc.