Design mods - remove social buttons and make page navigation more visible

Hello,

On my course page http://noduslabs.com/courses/how-to-create-stunning-visualizations-for-social-network-analysis/units/section-1-your-first-sna-in-15-minutes/?try

I want to remove the social buttons at the bottom and make the page navigation between the lessons more visible (by moving it at the top or somehow else).

Could you please tell me how I do that?

Thanks!