Riddle was launched for creating online quizzes. The first time that I tried it, I liked it. Since then the developer of Riddle has steadily added features to it. The latest batch of updates to Riddle is particularly useful to teachers.
The most important update to Riddle that teachers should note is a new option to require user names when replying to questions on a Riddle quiz.
Second, you can now build Riddle quizzes based on embedded YouTube videos. Previously you could only use images or text as question prompts in Riddle.
The third update of note is a new selection of text formatting tools. You can now bold and italicize your text. An option to make bullet lists is now available too.
Learn more about Riddle in my instructional video embedded below.
Applications for Education
Riddle's format of using images as response choices could make it a good option for giving informal quizzes on topics that require a lot of visuals. For example, a quiz on fractions might use pictures which represent various fractions. A quiz on art history might use Riddle to showcase works of art of answer choices.