I teach 3rd in Texas
I have been in the same grade in the same school for 19 years!!! I've been through, TABS, TEAMS, TAAS, "son of TAAS" (TAAS 2), and TAKS. I've hated them all, but they have all been survivable. I love 3rd graders. They are still sweet, love-their-teacher kind of kids, but by and large they can tie their own shoes, zip and snap, work more independently, etc.
For preparing for TAKS math, I STRONGLY recommend TARGET the TEKS and TARGET the Question. Both are bulletin board programs available only to Texas teachers. I can't remember the company name or website, but if your interested I can look it up for you.
My school is not departmentalized-still self-contained classes. We have the hardest time covering social studies/science TEKS. Next year we are looking to incorporate most of them into language arts and math. Teaching cross-curricular is about the only way I know of to get in all the TEKS. I'd love to know how some of the rest of you do it.
As for "one of the best districts", I think I'm in one of the best ones, too. We have a lot of kids whose families moved here specifically for the school district. This year, our 3rd grade had 94% passing on the 1st TAKS reading test. Haven't gotten math scores yet. Two years ago we had 98% on reading and 100% on math and were an exemplary school.