Don't some of Thunder Hill communities feed into Oakland Mills and Wilde Lake High Schools? Or do they all feed into Howard High? Looking at the fact that Howard County redistricts (change school boundaries) every few years it looks like some communities zoned to Thunder Hill will change very soon. Thunder Hill is a great elementary school. I don't dispute that fact. However, you really need to look at the boundary maps on the Howard County School website because I wouldn't want to send my child to Wilde Lake or Oakland Mills High Schools in the future. I wouldn't risk Thunder Hill due to future boundary changes. For all you know your child may end up at another elementary school within the next few years.
I'm not a big fan of Laurel either. There are some really shady areas of Laurel. Again, Hammond Elementary (just like Thunder Hill) is a great school. However, I don't like the feeder high school. So, I definitely will not select Hammond.
Honestly, if it were me, I would choose Centennial or Clemens Crossing Elementary Schools. With Centennial Elementary you're guranteed great feeder middle and high schools.
Clemens Crossing feeds into both Wild Lake Middle (neighborhoods north of Highway 32 - Hickory Ridge) and Lime Kiln Middle School (neighborhoods south of Highway 32- Holiday Hills, Riverside Estates, Riverside). All of Clemens Crossing feeds into Atholton. The only negative is the Wild Lake Middle School feeder. I personally wouldn't feel comfortable sending my child to Wilde Lake Middle. However, Clemens Crossing and Atholton are both great schools. If you choose Clemens Crossing, then pick the communities that have the Clemens Crossing to Lime Kiln to Atholton feeder pattern.
You could also, choose neighborhoods that have the Pointer's Run Elementary, Clarkesville Middle, and Atholton feeder pattern as well to avoid Wilde Lake Middle. Some neighborhoods have the Pointer's Run Elementary, Clarksville Middle, and River Hill feeder pattern which gurantees great schools.
Also, if you're looking into Ellicott City the neighborhoods that have the Veterans Elementary, Ellicott Mills Middle, and Centennial High School feeder pattern are great too.
Please look at the boundary maps and pay attention to the future boundary changes on the Howard County School page before you make a decision.
http://www.hcpss.org
Also, the local paper The Columbia Patch
http://www.columbiapatch.com or the Ellicott City Patch
http://www.ellicottcitypatch.com has some recent and past articles about schools and other information.
I will choose Clemens Crossing and Centennial over Hammond!