Changed heading

At Lois's suggestion

overview/impact.md

@@ -22,6 +22,6 @@ Scientific software provides a foundation for almost all areas of scientific dis
 
 Next-generation scientific challenges increasingly demand cross-team collaboration.  IDEAS work to improve community software practices and strategies for teaming is helping to improve collaboration across all scales --- from individuals to teams and also multidisciplinary, multi-institutional *teams of teams*.  
 
-# Culture change
+# Promoting culture change
 
 These synergistic activities are growing a community of practice to make software productivity and sustainability first-class concepts in advanced scientific computing. We are working toward a scientific software community culture that invests in and benefits from an explicit focus on developer productivity and software sustainability, adapting and adopting best practices from the broader software community and establishing our own contributions to these pursuits.