On artist like Matisse that I cover more frequently than some artist, I try not to duplicate the artwork exactly the same. I do this for several reasons. One, is for me. If I'm going to spend 3 maybe 4 weeks on a project with a grade level, I want it to feel fresh. Change is good and it makes it more exciting for me, if I'm more excited about the artwork, the kids will be more excited!
While it is hard to see, these Matisse collages here are built up with pieces of cardboard, so that it has a low relief aspect to it. The pieces of the collage are the same, but instead of a long vertical piece like the examples I posted several weeks ago, these are more square. Large 3-D pieces are hard to store but low relief projects like this one are more manageable with big groups of kids.