g = sns.FacetGrid(teacherValueFinal3, row='Grade Level', col='Course',
    margin_titles=True)
g.map(sns.violinplot, '2013-2014 Assessment Score', 'Gender', color='RdBu')
g.set_axis_labels('Gender', '2013-2014 Assessment Score')
Change the axes labels after drawing a violinplot on a FacetGrid