Udemy has a simple slogan: improving life through learning. The leading global marketplace for learning and instruction believes in helping individuals achieve their dreams. Udemy offers affordable classes aimed at working adults. The lectures are bite-sized and can be done on the go at any pace via their mobile app or at home. Their courses come with certificates of completion that can be great additions to your resume. Udemy boasts 35 million users, 57,000 instructors, 130,000 courses and is used by 80% of Fortune 100 companies for employee upskilling.