interchanging

"My friend told me there was something in the box, but I didn't know what it was yet. "

"My teacher explained the new math concept, and I understood it perfectly. "

"My family has a different ideal for my future than I do. "

"The contract was mutually binding."

"to interchange places"

"The quick interchange of ideas during the brainstorming session led to a novel solution. "

"During the school dance, students from different grades began to intermingle on the dance floor. "

"The alternate periods of rain and sunshine made for a very unpredictable afternoon. "

"He remembered with pleasure his home and family."

"Students need to buy their textbooks before the first day of class. "

"The complicated instructions on the new software difficult me from completing the project on time. "

"All in all, it was an even exchange."