Roots of Empathy is profiled in this 2019 report on teaching:
Unlike programmes that address bullying by targeting the victim or bully, Roots of Empathy works with the whole class. The programme teaches skills that enable all the pupils to gain insight into how others feel and to develop a sense of social responsibility for each other. They’re also empowered to challenge cruelty, whether this is in the form of bullying or meanness.
You can download the full report here. Roots of Empathy content starts on page 39.