This chapter explores the concept of ‘dialogic time’ and its potential to offer insights into the design and use of technology in education. Education, we argue, is centrally concerned with drawing students into participation in the longer-term dialogues of culture such as science and the arts. We suggest that the design of educational technology and associated pedagogy can bring different temporal contexts into a dialogic relation. Considering dialogic time as well as dialogic space can help educators design for more effective and expansive learning experiences.