Derailleur gears a detent or ratchet mechanism which stops the gear lever, and hence the cable and the derailleur, after moving a specific distance with each press or pull. Indexed shifters require re-calibration when cables stretch and parts get damaged or swapped. On racing bicycles, 10-gear rear cassettes appeared in 2000, and 11-gear cassettes appeared in 2009. Most current mountain bicycles have either. Many modern, high-end mountain bikes have begun using entirely one chain ring drivetrains, with the industry constantly pushing the number of rear cogs up and up, as shown by SRAM's Eagle groupsets (1 by 12) and Rotor's recent 1
Word sort to help students who do not have extensive reading vocabularies focus on isolated sounds (Initial, final, or medial) within a spoken word. These sorts are often a child’s first introduction to word study and are most commonly used with students whose developmental skills are at the emergent, letter name-alphabetic, or early within word Spelling Stages. Word sort activities involve students comparing, contrasting, and classifying words - considering words from a variety of perspectives. Bear et al. emphasized the importance of comparing those words that do fit into a particular category with those that don't. This type of engagement with words