Recommended for all uses of the TI-84
589501
This is the book I have been looking for!  It has simple and straight forward instructions.  I put it to use only minutes after I received it.
82658
I love my Texas Instruments TI-84 Plus hot pink edition calculator very much! The Calculator came in the mail very quickly, and it was very great for it to come so quickly! I needed the calculator for my Math 112(Introduction to Precalculus with Algebra) class, and luckily it did come in time before my first test. Do you know what I love most about it? If you learn how to do all the special little tricks, you do not even need to know the formulas for your math test! You can just plug that equation right into this fancy-schmancy little calculator and it will give you the very correct answer! Yay for keeping a 4.0 GPA! Well, unless your teacher is like mine was and you have to actually show all your work. But that is still a-okay, because you can make sure you have the correct answer before turning in that test of yours! yay! I love this calculator so much. it comes with a charger, which is great, because you will be using battery. I lost the charger in my mess of a bedroom, but ordering a new one was actually very easy and fairly cheap. you can also personalize some the colors and I just love it y'all!
4342566
I bought the Casio fx-9860G Slim Graphing Calculator because of the combination of enhanced and easy to use functionality, with a superb display.  After previously using other powerful calculators with tiny font sizes and confusing/massive instructions at times, this is a major step up.  It has everything needed for most mathematics - calculus, equation solvers, stats, spreadsheets, graphing, programming, recursion etc. and once connected to the Casio Web page using the included Casio software link, other apps can be added - the geometry app is fun and useful.  For the cost, this clobbers the higher priced competition - I donated a calculator that cost twice as much to my employer's charity Christmas raffles.  I had given up on calculators in favor of laptop/PC based math codes, but now it is fun again to use a calculator for courses and to just sit back at work sometimes & crank the numbers while going through tech. publications.
2004076
The TI-83 is definitely all you need to get you through high school calculus and most of your math classes if your major isn't heavy on the math or engineering courses. However, if you are an engineer or math major, the TI-89 is nearly indispensable. I know of one person who managed to get through his calculus classes (they were still undergrad studies, mind you) with an 83, but everyone else used an 89. Even for the students whose majors are biology, chemistry, etc. the TI-89 has a feature that allows you to store your notes in its huge memory. Of course, you have to learn to do this, but once you figure it out, chances are that you'll be extremely happy you bought this calculator.
2590492
Excellent tool for learning, improving, AND keeping up your calc skills.  This workbook is perfect for someone who wishes to brush up on stuff long forgotten or to reinforce skills for those just starting out.  I wish I had this tool when I first took calc-1 in 1962.  For the price this is an excellent bargain.  Truly for learning calc there was no such thing as the good old days.  Things today are fantastic for learning calc.
1296082
Last TI I had and used was the TI-83 for high school. I had to buy a new one for college. LOVE the upgrade. The color screens when graphing really helps and the blue shell color is quite to look at. It does everything I need it to do!
940534
Tihs is a great calculator for Civil Engineering applications. I really like the RPN function and stack view to see and use previous results with the push of a button. The menus and are very easy to understand onces you find where they are and how to get to them. It really feels and looks good too. I wish HP could desing a calculator like this with nothing but Civil Enginnering tools, no Graphing or things that make the calculator too dificult or crowded. But if you are going to do Enginnering a Hp50G is the way to go.
3704819
This calculator has an incredible amount of uses in various math and science work. The many algebraic features (polynomial expansion, factoring, etc.) allow advanced students to save time and allow novice students to check their own work.

The TI-89 also allows students to use several calculus features such as limit analysis, derivatives, and integration just to name a few. Also, the True-Type screen allows the display to be neatly organized without all the clutter and mess of something like a Mathematica readout.

Another nice feature is the plethora of graphing abilities this calculator has. From 2-D, to polar, sequencing, slope fields, and 3-D displays with rotation, the only thing missing from this calculator is a mouse and a printer.
2367919
The Texas Instruments BA II Plus Financial Calculator is a great fit for a finance student, someone in a related field, or taking a course in finance. I bought this calculator for my finance class at college and it has proven very useful.

This review is based on five criteria that I believe are important for the ideal user, that being a finance student or someone in a related field or anyone taking a course in finance. Those criteria are:

1. Price
2. Functionality
3. Ease of use
4. Durability
5. Size

The criteria are listed in order of importance, which was chosen based on levels of importance the ideal user may have.

Price:
Price is listed as the most important of the criteria, because typically college students are already spending a large amount on tuition and looking to keep other costs low. The calculator is not very expensive, on the contrary, it is quite reasonably priced; right around $30.

Functionality:
Keeping in mind that the ideal user is a student studying finance or a student taking a finance course, functionality is important because the calculator needs to have the functions required to solve finance problems. The functionality of this calculator is perfect for a finance course. It has all the functions that you would need while studying finance such as NPV, FV, PMT, etc.

Ease of use:
Ease of use is next up because you should not have to struggle with a difficult calculator when you are already having to learn the finance material. Not only are all the functions easy to find on the calculator, the calculator basically walks you through entering in the information for the functions.

Durability:
Durability considers the calculator lasting through four years of classes. Although this calculator would likely not last a career in finance, it would be sufficient for a four-year degree in finance.

Size:
Lastly, the size is ideal for a student. The calculator is not tiny, complementing its ease of use, while also not being very large and bulky and taking up a lot of backpack space.

Overall, if you are a student taking a finance course or studying finance, and find that price, functionality, ease of use, durability, and size to be important factors when considering a calculator, this is an ideal calculator for you.
4231014
I bought it because it was "recommended" for my finance classes but I personally find the TI-84 to be MUCH easier to use. If use of the TI-84 is allowed, don't even bother buying this. :)
4387685
CONS
Although this calculator is not the most "user friendly," once you get to know how to use it, it is very useful.
I have owned mine for about a year now, and I got used to the TI-85 in 3 weeks, before that I used my school issued TI-84 PLUS SILVER EDITION. If you prefer a "USER FRIENDLY" calculator, DO NOT GET THE TI-85, GET THE TI-84. it is a more user friendly calculator.

Enouph with the cons, on to the pros.

PROS
The TI-85 is a very powerful tool for use with graphing. I personally would not prefer any other than it. If you are up to the challenge of GREAT calculations, get the TI-85
3246855
These calculators are handy. I'm a math major and purchased this for a work related class, as they wanted to instruct on a scientific calculator, but not a fancy or costly one. I've been impressed and carry it around with me still. I have a TI-83plus and a TI-NSpire CAS, but this one still fits a niche. This particular blue calculator was a second purchase for my daughter for high school geometry class. She loves it.
2009364
Was looking for the Triola Elem Statistics 11th ed.  Saw this which is a better fit with my current Statistics course (TI-84 required).  Very happy with the book and its interface with the TI.
125109
Fits the TI 84 Plus CE nicely.  Ordered another one to hold a USB Charger (4 ports) and two cables.
2076622
Bought this for my son because he had to have a TI-84 calculator for his math class.  It worked great and was in good condition when we got it.
727786
A very good scientific calculator. Since my science department will not allow the use of graphing calculators due to potential abuses this has become the third calculator I've purchased for school (my others are a TI N-spire CAS and CX).  This does everything I've needed it to do.  The display is three line and easy to read.  The calculator has pre-programmed conversions (convenient if the instructor does not require all work to be shown) and constants (which are useful providing that the values provided in class, which are sometimes rounded off for ease of use, match what the calculator has stored).  Equations are fairly simply entered in a form that closely resembles what would be written on paper.  I did find the non-highlighted silver operation keys on the right side of the keypad to be annoyingly difficult to read in certain lights; My solution was to use a sharpie marker to color in the symbols for ease of use.  Another small gripe but one which has no impact on use: the scroll key (the round button on the upper right) is 'creaky' when being used.  I had hoped that over time it would wear in and quiet down but that hasn't happened over the course of a semester.
3791664
You can't know how invaluable this little thing is until you have to take the dreaded Calculus.

I'm in high school and currently taking Pre-Calculus and in a month I'm starting AP Calculus. While in high school, I was enrolled in an early college program. I've managed to ace my College Statistics, Geometry, Algebra without the help of any Texas Instrument calculators. Got by with a simple scientific calculator.

But Pre-Calc is a different matter. We were required to use TI 84 Plus Silver Edition. And I'm glad I learned how to use it before heading off to college. I just know that this handy device is going to save me tears when it's time for College Calculus.

STARTING:
I'm still learning how to use the device. It can get a little overwhelming at first because of the many buttons and the many functions.  Yes, it is intimidating and yes, it is a little complicated.

But be patient, read the manual or get the book TI 84 for Dummies.

THE PRICE:
I do agree that it is very pricey, especially for student budget. It can really hurt your meager student savings, like it did mine. But this is a good investment, especially if you are planning to major in something involving a lot of math.

THE LOOK:
Not bad. It's silver so it looks a bit more elegant than the previous black TI Calculators. There's also other colors to choose from like pink, blue, purple and orange. No matter how much tempted I am to buy the girly pink TI84, I settled for a neutral silver because I might decide to bequeath it to someone else if I purchase a new one later on.

It is a little bulky and heavy for me. But one thing I can say for it is that it is tough. Mine hit the concrete floor about 3 times already. It sustained a little scratch but that is it.