FutureLearn was one of our earliest mega-site projects in the Education space.  Our job?  Double rankings in 6 months.

We built an entirely new system to display content, did link building, and did technical SEO. The 2x traffic target was reached, and the project was taken inhouse  where, regrettably, it has since struggled.

SEO is always changing, you must change with it.  What works today might not work tomorrow.  Adapt or die.