Check out these links...
Effective Presentations
https://hbr.org/2013/06/how-to-give-a-killer-presentation https://www.circlesstudio.com/blog/presentations-tips-ideas/ https://www.aeaweb.org/content/file?id=651
Working in teams/groups
https://bokcenter.harvard.edu/group-work
https://student.unsw.edu.au/groupwork