Describes a contemporary adaptation of the "Footprint Puzzle," whigh was first developed in the 1960s for the Earth Science Curriculum Project. Students sequentially look at three frames of track drawings. For each frame, students first list observations and then make inferences about the observations. (PR)

Describes an activity to develop students' skills of observation and recordkeeping by studying the growth of a tree's leaves during the spring. Children monitor the growth of 11 tress over a 2-month period, draw pictures of the tree at different stages of growth, and write diaries of the tree's growth. (MDH)