These ten-question quizzes are refreshed each Friday -- one edition for middle school students and one for elementary students. Questions are presented one at a time as multiple-choice. You have only ONE try to select the correct answer, so think carefully! Points are awarded for each correct answer, up to a possible 100. When you finish, you see your score. Questions are intentionally designed to stretch thinking: 5-point questions tend to fall at the knowledge/comprehension/application level of Bloom's taxonomy; 10-pointers are more likely cross-curricular; and 20-pointers require analytical thinking, broader experience, or knowledge of current events -- and may benefit from more than one student's input. Printable versions are available for both editions, along with answers to the previous week's Twisters. A new version is also available for students to take on mobile devices.