The Minnesota School Mathematics and Science Teaching (MINNEMAST) Project is characterized by its emphasis on the coordination of mathematics and science in the elementary school curriculum. Units are planned to provide children with activities in which they learn various concepts from both subject areas. Each subject is used to support and reinforce the other where appropriate, with common techniques and concepts being sought and exploited. Content is presented in story fashion. The stories serve to introduce concepts and lead to activities. Imbedded in the pictures that accompany the stories are examples of the concepts presented. This unit stresses the geometric interpretation of number on the number line. The notions of "greater than,""less than" and "between" are presented (or reviewed) by reference to the number line. Egyptian and Roman numeration systems are explored and an intuitive presentation of non-decimal systems is contained in some of the activities. Worksheets and commentaries to the teacher are provided and additional activities are suggested. (JP)