This paper traces historical events in the development of primary science in Botswana. It identifies changes that have taken place from 1969 to 1989. Prior to 1969, the word science in primary schools was non-existent. Primary pupils were taught nature study which emphasised hygiene and plants. The revised 1982 primary science curriculum coincided with the period of rapid industrial developments in Botswana. The purpose of including physical science concepts in the primary science curriculum was to prepare the nation for industrialisation. The purpose of including environmental concepts in the primary science curriculum was to raise the environmental awareness of the nation.