Constructions (CON)
Children investigate structures and the effects of forces, motion, and equilibrium. They construct models of walls, bridges, towers, and classify building materials by strength, weight, and other properties. This unit was published by Creative Publications and is part of their Windows On Science program for young children.

Rocks, Sand, and Soil (RSS)
Children investigate a variety of rocks, sand, and soil. They sort and classify rocks, observe soil components, and investigate various properties. This unit was published by Creative Publications and is part of their Windows On Science program for young children.

Weather (WAM)
Children observe the weather and collect and record data about basic weather features including wind, temperature, precipitation, and cloud cover. Children record weather observations, construct graphics, and record information on a weather calendar. This unit was developed by the National Science Resources Center with support from the National Academy of Sciences and the Smithsonian Institution.