DS5 just finished up his kindergarten year and did this all year long. He just refused to do 'busy work'. He just couldn't understand why he needed to sit there and practice letter sounds when he was already reading, and reading well.
What helped a little bit was that he was sometimes given different 'busy work'. While others were practicing letter sounds, he was using a sentence kit and building 'silly sentences' and reading chapter books.
He hates anything repetitious, when we do math, he'll only tolerate a few of the same type of problems, so I have to constantly switch it up, or he'll shut down.
