Anonymous data and supplementary materials repository for CANTEC-19, and especially pertaining to two papers, one on adolescent social play and one on adolescent transitions. Wrt data, only survey data are archived here - did not get ethics approval to share qualitative data from focus group discussions. Qualitative instruments and other study materials are archived here, though. Will further clean data set and offer more detailed descriptions/ data library here and/or on github if/when paper(s) is/are accepted.