3. Bill Gates
As co-founder of the tech giant Microsoft, Bill Gates is a household name and globally recognized STEM expert who has also managed to amass a huge social media following. Gates’ posts are mostly about science and technology, especially where those fields intersect with philanthropy. His recent posts include a news story about a company using mobile phones to provide affordable electricity and links to coding tutorials. He also makes periodic educational book suggestions, such as Mindset by Carol Dweck, a title about how self-image can impact how we learn.