This study explores how teachers use tablets for learning in secondary schools. The use of tablets in compulsory school education is increasing (Balanskat et al. 2013), and research is has to some extent focused on the affordances and potential of the technology. Calls have been made for research on emergent teaching designs, classroom practices and learning. Part of a larger research effort this paper draws upon observations of, and subsequent interviews with teachers using tablets in their 1:1 Finnish secondary school classrooms. This allows description and comparison of teachers and their different Digital Didactical Designs (DDD) in practice. Grounded in Jahnke's DDD model (e.g. Jahnke et al. 2013), and informed by CSCL research, this paper identifies patterns and challenges in tablet-supported didactical designs. The discussion focus on opportunities to enhance the interactions between learners and their partners that enhances tcollaborative learning with tablets in secondary school education.