My child also prefers to play (he's 5.5). If any teacher offers something to the effect of "should I give him more work or another worksheet?" I say no.
At the ages I have (so the advice may not be relevant to you), as long as they are happy in school and participating, along with making progressions in learning, I don't worry about the general "challenge" level of school. DS5 is working several years ahead in all areas, so a harder worksheet wouldn't fix the problem anyways.
Can you introduce challenge outside school? My son does piano as an example in private lessons that move at his pace.
