I have been struggling with a problem for a while now, that is, how to help my third-grader with his math. He is generally very good with concepts, but not so good in computation: lot of careless mistakes, and not quick enough, etc. I occasionally make up some math worksheets for him to drill, which is helpful, but I just do not get enough time for this. I'm trying to find quality worksheets online. Anyone has any sites to recommend? Free worksheets would be great, but I am willing to pay, as in the saying that quality comes with a price 
. I don't quite like those sites that require subscription since they tend to have lots of unnecessary stuff. I stumbled on this site lately: www.tigermommath.com[/URL], which looks pretty good with worksheets targeting specific problem areas, and all worksheets have built-in timer, a quite useful feature. I am wondering if anyone has used it.
-Ellen
. I don't quite like those sites that require subscription since they tend to have lots of unnecessary stuff. I stumbled on this site lately: www.tigermommath.com[/URL], which looks pretty good with worksheets targeting specific problem areas, and all worksheets have built-in timer, a quite useful feature. I am wondering if anyone has used it. -Ellen