One concept: Multiple uses!
This product includes two sets of (the same) collection of verbal expressions for students to use to generate expressions with focus of student understanding on where to place parentheses.
One use could be used for PARTNER WORK: Students work together to solve a collection of task cards. Personally, I cut and glued the cards onto index cards and my students received the laminated index cards to work with. There is a recording sheet provided for them record answers.
Another great activity I added into this is SCOOT: Place a card at each students desk, then they rotate from desk to desk generating and writing these expressions onto their recording sheet.
The cards in general would be great to use in small group setting as well.
Use in your classroom as you'd like!