The primary analysis will employ an ITT analysis, with multiple imputation of missing data, using linear mixed models to compare the two trial arms on an aggregate score on the two social skills scales at T2. T1 scores will be included in the model as a covariate. Secondary analysis will use similar models for other outcomes at other time-points. To obtain adequate statistical power, the two treatment arms will be split equally using a 1-to-1 ratio. Clinically valuable change (MIREDIF) on the primary outcome requires a minimum 15 scale point improvement which is equivalent to a .6 standard deviation change. This require 32 Students (16 in the Study Group and 16 in the Control Group) to obtain a power of 80% (100% - errors of type II) using a conventional statistical level of significance of 5%. The group will be stratified for sex of participant and by which unit they are attending.