I hope that it is okay to add to your my experience as maybe several POV would be helpful!
I am re-careering. I work in education and I have been out of school for 25 years (I am not a math, science or English teacher). English is my first language and you will have an idea of my age by how long its been since I was in school.
I took micro in Spring 2017, AP 1 this summer. I starting looking at TEAS library books in June (mometrix and Kaplan). I have been studying for about 3 weeks a couple of hours maybe 4-5 times a week. I have taken the practice test in every book I could get my hands on.
I ordered the ATI TEAS prep on Amazon
for 19.00 and then the A and B package for 92.00 about 2 weeks ago.
I started with one practice of A and B and then looked at what I was missing. You can take each 2x but know that you are taking A twice and B twice so you don't want to take them too close together or you will remember the answers. I following Khan academy for math and used my AP book for Science. I used noredink.com for English and reading.
I tested at the CC that I am applying to. It was online and very similar to the set up of the practice test. The actual calculator in the test has a % on it (btw). I could take a break at the end of each section where I had extra time and the option of letting the proctor know I needed a break in between exams. The results were IMMEDIATE.
Practice test A round one = 83
Practice test B round one = 80.7
Round 2 was too close to round one and the scores were too high for me to consider valid.
Final TEAS today = 87
Math 90 (what???)
Reading was what I expected (but I needed to know more about the difference kinds of writing.
Math was easier - not as much algebra (which I totally relearned for this).
Science I knew what I knew from micro and AP plus a little detailed extra review of the structure and functions of each system and their hormones.
English - good think I reviewed the different parts of speech, but certainly still missed some of those.
Good luck everyone!