Braingle
Braingle: Letter Equations Brain Teasers
The letter equations at this site test your critical thinking skills as well as your knowledge of facts dealing with a variety of subjects: geography, music, history and more.
Braingle
Braingle: Mentalrobics Memory
Prepare for tests and exams by using the memorization techniques described at this website. Learn about the "story system," the "link system," the "keyword-mnemonic technique," and other ways all students can improve their memory skills.