3 pages are provided so that you can differentiate instruction or use for different grade levels.
I have done this with the individual boxes or hearts as well as with putting some from a large bag into a cup or baggie for my students. We have also done it whole group with the students making their estimates and then use counting along together so that we are all working with the same number. This really helped with making sure all the math was done correctly.
Border from: Graphics from the Pond http://www.teacherspayteachers.com/Store/Graphics-From-The-Pond