The curricular integration refers to a situation in which everything is related where the subject areas of the student are linked to make the knowledge be connected better. Sometimes, the students think the subject they study are not connected at all; this has to be changed. Teachers have to make every subject be realated with one another; for example: social studies can be linked with literature since many literary movements are the product of many historical events. It requires a little effort from the teachers to link all the topics, but it is worthy since in that way, students will remember facts that will help them for all the subjects. The main goal of this is that students become CRITICAL THINKERS.
The following video gives further information about this integration.
Amazing Didactics 