I agree with rswyan - he's brought up a lot of good points.
I don't completely agree with drzmatt when he says </font><font color="blue" class="small">( Kids need to be given personal responsability in order to have it. It is their parents that are the problem, not them. If you have low expectations of your children that is what you will get. )</font>
Sometimes its just genetics, plain and simple. I have a 4 year old daughter with my wife, and an 11 year old stepdaughter and 13 year old stepson. Man, there is a huge difference between the 4 year old's abilities, and the two older kids - it even amazes my wife. My dad was hard on me so that I wouldn't turn out to be a complete lazy dope when I grew up. If my dad was still around, I think he'd be proud of how well I do when it comes to trying to teach the 2 stepkids. I've had 8 years to work on them, and I swear, that some of the things I'm dealing with to this day, I've been dealing with for all 8 years - some things just don't sink in. Then there's the little one who picks up on things much quicker than the older 2 did at her age, and even at times, than the older 2 do now.
I don't know how many times I've ended up asking the 2 older kids how many times I have to show them how to do something before they'll finally get it. The little one, on the other hand, picks up on things as soon as she sees it done just once.
You just have to learn, as a parent, how to best ATTEMPT to get the point across, and hope to God that some of it actually sinks in. Sometimes you're successful, and sometimes you fail miserably. And often times, you can get extremely frustrated - I don't know how many times I say "I give up!" But, I guess us parents are gluttens for punishment, cause we end up trying again, hoping that something gets learned before they get out on their own. Believe me, you can have high expectations, but it doesn't mean that all kids can meet those expectations. It is a nice change when one of them meets, and actually exceeds your expectations, and amazes you while doing it.