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      Pelizzari and Cuban Pipin Ferreras frequently break world records by diving without the use of wet suits, fins, or oxygen tanks. Extreme Free Diving is truly a breathtaking sport. One day adding the word «Deeper» to the Olympic motto of «Swifter, Higher, Stronger» looks like a sure bet. The legendary Yorgos Haggi Statti would wipe water from his eyes, smile, and nod in approval.

      Effective Teaching Techniques. By John Fletcher.

      The most consistently identified teacher effectiveness variable is time on task. That is, the more time that students spend learning specific academic content, the better they will learn it. Distinction is made between allocated time on task (the time that teachers allocate to particular instructional activities) and engaged time on task (the time that students actually spend engaged in instruction). Although no consistent relation has been seen between allocated time on task and academic achievement, research has demonstrated that engaged time on task is positively related to academic achievement.

      Strategies for maximizing engaged time on task have been identified and include effectively managing transitions, avoiding digressions and other irrelevant verbalizations, and managing classroom behavior. Sometimes, teachers can improve studentengaged time on task by examining the amount of allocated time for class and monitoring their own teacher behaviors more closely. For example, teachers may find that they start classes 5 minutes late, end classes 5 minutes early, stop during the middle of class to search for relevant instructional materials, and stop to manage inappropriate classroom behaviors. Once such target areas are identified, teachers can design strategies to improve each area that will result in increasing the amount of student-engaged time on task during classes.