first grader traces the path of a caterpillar on a leaf. Two fourth graders monitor the growth of their salt crystals. ... the attitudes of their parents and grandparents, their brothers and sisters, and other people in their environment. ... Students need to feel free to ask questions, and free to grope for answers, knowing that even scientists dona#39;t have all ... The show and tell of the primary classroom, with rocks, butterflies, and toys; the science fair projects of the upper grades; outside reading;anbsp;...