Let the students find that in dealing with the images which can be stacked safely fit. And then each group representatives say the same can find many images and photos?
Students find that the case at issue, then there are some that can be stacked into one group and then each agent that can form a figure equal to all and any.
Let students find out the envelope that deal going to have any pictures that can be stacked properly.And then a representative of each group said that they can find picture rate how many images and any shape.