Yes, I use worksheets, but I try to use the real thing whenever possible. We're studying plants right now. I think most schools are, now that spring is here. There's always a wild batch of wildflowers somewhere around where we can pull our samples. I gave each child a sheet of construction paper, and we glued our plants on them. Allow to dry overnight. The next day I wrote the words LEAVES, ROOTS, STEM, and PETALS on the board for them to copy, and they had to place the words in the correct areas.