Talemy is your ideal education WordPress theme for sharing and selling your knowledge online. Teach what you love. Talemy gives you the tools to create an online course.
Quizlet is a free online resource that allows teachers to create study tools (like flash cards, quizzes, and games) for their students. Paid subscriptions are offered with more options but teachers can also develop many tools for free. Link: https://quizlet.com/teachers