You're right. Teas is really about the basic knowledge you learned from high school and first 2 years of college. You really have to review and go back to basic . If you purchase the reviewer they recommend from ati plus the practice exam- I think you will be fine. Why don't you study the reviewer Teas V manual- the reading, grammar and math. Do a lot of practice exam especially for math- you want to be fast- learn some tricks that will lead you to the answer right away. The math part is basic math but the critical part is the TIME. Reading part- the teas v manual will really help you big time- but you have to practice doing the test and time yourself.
Science- my advice is read the teas v manual BUT since science part is toooo broad - you need other sources. YouTube - khan academy is great help for me . Reviewer for anatomy and physiology- but just follow whatever the teas v manual covers. For example- the reviewer covers about mitosis and meiosis but it's not compete. So after reading the teas v manual - go read more details about it from other book or if your a visual learner- YouTube helps you understand. Punnet square- know it by heart coz they will ask different style of questions. Scientific method- if you understand the steps - that's good- but try to apply it to the real world- coz they are going to give some scenario. This was my weakness but I figure out anyway. Try to understand - interphase - by heart!!!!! The functions of the cells, organelles, and all the systems in the body.
For the science part- what I did- after I read the teas manual-look at the table of contents for science and use it AGAIN as a guide for you but this time- it's either you use YouTube or another book. This one really helped me a lot!!! My score went up from 77 to 89 for science.
Reading and math- teas v Manual is pretty good.
Grammar- I think teas v manul is good but for me I have to rent some books at the library. For the grammar part- my big advice is know the rules for punctuations and know what is adjective, adverb , nown, pronown- I tell you- it may sound very easy at first but I swear , their very good on tricking the test takers. However- if you MEMORIZE the rules for grammars - just follow whatever the reviewer covers - this will really help you.
Lastly, practice practice practice- no matter what- practice and time yourself - this will really help your brain prepare. No matter how good you are- if you don't practice - it wil pull down your grade. When I first took the exam- I did not practice at all because for me- I really don't need to practice - but I was totally wrong!!!pleade don't repeat this mistake.
So go ahead and start studying:) you can do it. Never give up!!!
Goodluck to you. If you have questions - don't hesitate to ask me:)