Lesson VOC 8
Task: Unthread a out and bolt. Prerequisites: SEN 13, SEN 18 Concept: This fine-motor activity may or may not be relevant to the student, current or future work situations. The point of this activity is using fine-motor skills to ma-nipulate small parts, part of a wide variety of work experiences. As with all small-part activities, make sure that students do not attempt to ingest these items. Behavioral Objective: When requested to .please undo these," the student will hold a bolt with a nut attached at least halfway down the shaft and rotate the nut until it is removed from the bolt for 10 examples to a 9. accuracy level for 20 trials. Materials: A variety of bolts with matching nuts (a least 10). Larger sizes are preferred. Task Analysis: 1. Review with the student the prerequisite skill of unscrewing a lid from a jar (SEN 18). On this occasion, emphasize the concept that a counterclockwise turn usually removes a screwed-on item. Attempt gross-motor imitation using hands in the air to teach the concept of the direction to unscrew something. 2. Screw a nut about halfway down the shaft of a bolt and guide the student to hold the bolt by the head (unthreaded end) with his or her nondominant hand. Practice the process of picking up the bolt by the head until this aspect can be completed with only verbal encouragement. 3. Guide the snident to grasp the nut in a pincer-like grasp (SEN 13) and assist where needed to begin counterclockwise rotation of the nut. 4. Continue Step 3, reducing physical assistance and replacing that assistance with gestural and verbal prompting. Remain on this step until the student can completely remove the nut from the bolt 5. Gradually reduce all prompting until only the total-task verbal prompt of "please undo these. is needed for at least 10 samples and the objective is met.