letters, compound and abbreviated words, contractions, homophones, homographs, prefixes, suffixes, and base words. "Brain tickler" problems challenge students' imaginations and test their learning progress. Barron's popular Painless Series of study guides for middle school and high school students offer a lighthearted, often humorous approach to their subjects, transforming details that might once have seemed boring or difficult into a series of interesting and mentally challenging ideas. Most titles in the series feature many fun-to-solve "Brain Tickler" problems with answers at the end of each chapter.

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