Presented are 75 suggestions for investigating in grades K-6 such common urban resources as trees, seeds, polluted air, rocks, and insects. The manual is designed for use with the Urban Discovery Box which contains samples collected from eight urban resources along with some objects helpful to investigate these. A section in the manual for each of the eight resources provides teachers with needed information for helping the pupils carry out their investigations. Many potential problems for investigation are directed at the development of such science processes as hypothesis formation, observation, data collection, the making of inferences, classification, and formulation of problems. Numerous discussion questions are also included. A complete list of resource materials is provided for the development of a "discovery box." This work was prepared under an ESEA Title III contract. (RS)