I have a 14 yr old in the 8th grade in Texas. She was diagnosed with dyslexia in the 2nd grade and completed the dyslexia program by the beginning of 4th grade, her dyslexia isn't as crippling as other kids, but is still a disability she must work to overcome.
That being said, she has taken TAKS since 3rd grade and took reading, writing and math STAAR last year in the 7th grade. She has always performed above average on the state tests, but fell below commended levels in reading on TAKS. Imagine our shock and pride when we received her STAAR results (just last week, don't know why it took our district almost a year!) She received a commended score on reading!!! She scored very high, but not commended on writing as well. Math...eehhh, that's where we need to work now :)
Your daughter needs to learn to manage herself on the testing days. She will have a couple of years to get used to it before it really "counts" in the 5th grade and the experience will be so important to her. The only accommodation we've ever requested for our daughter was on the science test. So many scientific terms are spelled almost identically and can be easily switched out for one another, even if you don't have dyslexia! And, you guessed it, she was commended on her 5th grade science TAKS. This year she will take science, social studies, reading and math and the district will provide an IPOD for her to listen to the test being read aloud. Again, we are only asking for this accommodation in science and I had to confirm with the campus 504 coordinator to be sure all the paperwork was in place well in advance of the test date. Asking for help is nothing to be embarrassed about, she knows the material we just don't want some dang flip-flopping letters to wreck her score.
Good luck! With a lot of work and time, your daughter will overcome this and perform well and maybe even learn to enjoy reading!