Public School Vent

So ever since Skyler and I have moved from California to Texas we have been blessed by a good school, awesome teachers and a decent counseling staff and principal. This year is way different and not just because Skyler is in the 3rd grade. I think alot of it has to do with the teacher he has. She is way to vague in what she tells Skyler. Skyler is someone who is very methodical in his thoughts and actions. He needs things explained in great detail. All of this is in his school profile, and I spoke to her about it before school started as well as at our parent teacher conference in early October. At that she told me what a great student Skyler was and he was an A student, never gave her any problems. That was 3 weeks ago. What in the world could change in 3 weeks? In the last 3 weeks , Skylers grades have dropped to very low grades, he doesnt understand what the teacher is saying or expecting, he gets confused with what she says. I tried calling today to set up an appointment to speak to the principal to o over my concerns with this teacher and Skylers performance. The principal never returned my call today so I plan on calling again tomorrow and the next day until he is willing to see me.
This whole situation brings me to the question do I keep Skyler in public school, homeschool, or do a private school? I am seriously thinking a private school is going to be the way I go for him. Its more one on one teacher student interaction. I know he will excel again in a setting like that.
I also question how much homework is  a  3rd grader suppose to have. he comes home every night with a packet, plus a handwritting paper, and spelling words that he is to write 3 times, and 3 other activiites that he is required to do.
We are trying to research the best thing for Skyler is it letting him finish the school year and think he is a bad student or homeschool, or do a private school.. We are leaning towards the last two......... with homeschool until the semester break in Jan then doing a private school. Any opinions?