Redesign Educational Lecture Presentation

I need an engaging PowerPoint redesign for an educational lecture. The nine PowerPoints decks exist now and are used at Texas State University. The PPs are now going to be included with a new textbook and need to be reworked to comply with the publisher's design... (Budget: $15 - $25 USD, Jobs: Brochure Design, Content Development, Content Strategy, Data Visualization, Design Thinking, Graphic Design, Infographics, Powerpoint, User Interface / IA, Visual Design)