Easy accountability for reading comprehension... teach children how to videotape each other using an ipad, and record retelling a story or other 'final product' type scenario. Also great for reporting information found / learned, summarizing, showing the results of a game or activity, etc.
"If you can't control your mouth, there's no way you can hope to control your mind.' This is why right speech is so important in day-to-day practice. In positive terms, right speech means speaking in ways that are trustworthy, harmonious, comforting, and worth taking to heart. When you make a practice of these positive forms of right speech, your words become a gift to others." --Thanissaro Bhikkhu