An empirically founded and widely established driving force in opinion dynamics is homophily i.e. the tendency of "birds of a feather" to "flock together". The closer our opinions are the more likely it is that we will interact and converge. Models using these assumptions are called bounded...

We use data from a large field experiment where young students were pulled out of their regular classes and offered mathematics instruction in small homogenous groups, to investigate the importance of the tutors' instructional practices. The analyzes are limited to low achievers, and the...