Here is the foldable classifying cloud types by their position in the atmosphere. The info inside is kept quite simple and concise for our fourth grade needs. The book is made from copy paper or cardstock. Cut the 8 1/2" x 11" paper into four strips, lengthwise. Each student will get two of these. Slightly off-set the strips before folding, and fold so they are off-set. This provides the graduated page lengths.