For this activity, two texts about the same subject are required.  After the topic of the texts has been introduced, one half of the class gets one of the two texts while the other half gets the other text.

Each group of students is instructed to read their text for main ideas and important details.  After the students have finished reading, the groups get together and verify the information they found.  Once both groups are comfortable with their text, they are then paired with a student from the other group.  The two students exchange the information they read.

I personally conclude this activity with a short group quiz about the texts in which students who didn’t read the particular article are the only ones who can answer (if I read text A, I cannot answer questions about this text.  Only my partner can).