TI-Nspire CX Review

The TI-Nspire CX

Please buy your TI-Nspire CX on Amazon for the best price and FREE shipping.

Over my many years teaching in the high school math classroom, I spent more time working with the TI-Nspire than any other calculator, and it has become my favorite graphing calculator platform. I like to keep the my TI-Nspire CX review fresh, and since the last time I wrote this review, a new version of the operating system was released. So it seems only logical that a 2016 update of my review is also in order. This post is both a TI-Nspire CX review and TI-Nspire CX CAS review, although you’ll see while reading it, the two models have more in common than they do differences. 

What’s Happening With the TI-Nspire Platform Lately?

First, a seemingly minor but potentially important change for calculator buyer occurred last year when TI-Nspire OS 4.0 was released for the TI-Nspire CX and TI-Nspire CX CAS. For the first time ever, the older “grayscale” (non-color screen) models did not receive the operating system upgrade, meaning they continue to be stuck at OS 3.9. While 4.0 was mostly full of incremental upgrades (more on that later), if you are planning on buying your Nspire for up to 4 years of high school or college, I would hesitate to pick up an older model that might not continue to receive more upgrades like the “CX” model. Over that length of time, there could be enough changes to the operating system that the color models menu systems and features might start to look noticeably different from the greyscale models. I can tell you that 4 years ago, these calculators did look significantly different. I point this out because it is very tempting to look on Amazon and see that the TI-Nspire non-CX models are still being sold there are and significantly cheaper. Proceed if you will, but buyer beware.

That caveat issued, I will say that the TI-Nspire continues to be the most complete platform for students and teachers of mathematics at the high school and early undergraduate level. Several years ago, we saw the release of the TI-Nspire iPad app (review). I was very impressed with this app and do recommend it even at close to $30. However, you should keep in mind that it’s simply not a replacement for a TI-Nspire CX handheld since it’s not allowed on standardized tests like the SAT or ACT.

I will say that even before the updates of the last couple of years, I had felt that from an educational standpoint, the TI-Nspire operating system was superior to any other TI product (such as the TI-84 or TI-89). I like the fact that it uses the type of interface that kids who have grown up in the internet era are familiar with. That means it has drop down menus, the ability to open multiple tabs like a browser, a drag and drop interface, and a file and folder system that’s just like using a computer. Graphing calculations have been much simpler, not requiring much button pressing beyond the trace feature because the Nspire automatically detects max and min values and intercepts while using trace. It’s also easy to type in your calculations using mathematical symbols so that they appear just like a student would see them in a book or write them in their homework, so there’s pretty much no code to learn. What really sets the Nspire apart has always been its dynamic properties. On one screen, you could have a graph, an equation, and a table of values. Grab the graph and drag it into a different shape, and all three adjust simultaneously.

Ever since the OS 3.2 update a few years back, Texas Instruments gave teachers and students the features that they have been asking for. There are some really awesome new features for the TI-Nspire CX. The biggest upgrades with OS 3.2 were graphing features. Owners of any up-to-date Nspire now have the ability to graphing conic sections and any equation written in “x=” form. This is something Texas Instruments users have wanted for years. You can see this and more below in the TI-Nspire CX video review I recently put together.

TI-Nspire OS 4.0 brought improve geometry and graphing capabilities
TI-Nspire OS 4.0 brought improved geometry and graphing capabilities

The more recent operating system updates have been more modest in nature, but have definitely been noticeable and welcomed by regular users. For example, the most recent version of the OS, 2015’s 4.0 upgrade, primarily made incremental upgrades to graphing and geometry capabilities such as the ability to customize the 3D environment to show 3D graphs in either orthographic projection or perspective view and the ability to have geometric shapes have their points automatically labeled and their angles forced to integer values (see screen capture, right).
In addition to software upgrades, Texas Instruments has made some minor hardware upgrades as well. Since 2014, the latest TI-Nspire CX model has had an improved battery design. Previously, if you were having battery issues with your TI-Nspire CX, the battery was wired into the Nspire, and there was always a “hold your breath” moment of disconnecting that wire. The new battery is smaller and connected by a compression contacts like a cell phone battery. It pops in and out very easily. This isn’t an issue that comes up very often since the CX has a rechargeable battery, but I’m still glad to see it addressed.

Texas Instruments continues to be extremely active in teaching teachers how to teach with their TI-Nspire platform as well. “Get Nspired” is more than a catch phrase. They hold webinars demonstrating engaging ways to use the Nspire CX that are of extremely high quality. Additionally, the last couple of years, they’ve started a series of initiatives STEM Behind Hollywood, STEM Behind HealthmISSion imaginaTIon, partnerships with powerful groups like the entertainment industry and NASA to show students how mathematics and science can be applied in exciting fields, all of course, with your TI-Nspire graphing calculator.

What’s Different About the TI-Nspire CX Anyway?

The new design for the TI-Nspire CX is very thin

So that’s what’s happening with the TI-Nspire platform lately, but what made the TI-Nspire CX such a hit in the first place? The TI-Nspire CX will always be known as Texas Instruments’ first color graphing calculator, and an improved design came with it. When first released, it was a much thinner, lighter design that we’ve seen from TI in the past–more like the thickness of a standard scientific calculator than previous graphing calculators. The odd “wings” of previous TI-Nspire models are gone. The screen is gorgeous. The resolution is good, the colors are bright, and the display is easy to read. You won’t mistake it for an iPhone, but it’s better than any display I’ve ever seen on a graphing calculator, including the Casio Prizm (review), despite my love for the Prizm. As I type this, the backlighting is bright enough to read easily from my deck in the shade, although not in direct sunlight. However, I don’t know anyone who would uses their graphing calculator in direct sunlight.

ti-nspire cx new battery
The 2014 redesign brought a better battery design

I’ve tried the image features on both the TI-Nspire CX models and the TI-Nspire graycale. You have the capability to load any JPG, BMP, or PNG file onto the device and graph functions right on top. It certainly works on both color and grayscale models; I’ve even posted pictures of the grayscale pictures on the Nspire already. However, I think the screen captures are a little deceiving. While the pictures look great on the computer screen in both color and grayscale, in some cases they’re actually kind of hard to make out the the Nspire grayscale. No worries if you are on a TI-Nspire CX; images look great on the handheld.

I can also tell you that the buttons are “snappier” and more responsive than previous TI-Nspire models. Back when I first asked him about this, Dale Philbrick, Texas Instruments Marketing Segment Manager for Mathematics, told me that this was accomplished by a combination of hardware and software upgrades.

Along with this change, there are no more interchangeable keypads. That means you can’t use the TI-Nspire CX as a TI-84 like older Nspire models. When Philbrick and I talked about this back at the time of the Nspire CX release, he said, “We felt like it was time for people to start using the Nspire as an Nspire.” No argument here. In the early Nspire days, I used to be frustrated with the occasional student who refuses to give up their Nspire’s TI-84 keypad but then makes mistakes on problems that are so much easier with the Nspire, such as secant, cosecant, and cotangent (which can’t be found directly on the TI-84). With each new TI-Nspire OS, the TI-84 just feels more and more outdated.

TI-Nspire CX CAS Review

TI-Nspire CX CAS and TI-Nspire CX

Judging based on polls I’ve run in the past on Tech Powered Math, I’ve found that there’s actually more interest among TPM readers in the TI-Nspire CX CAS than there is in the TI-Nspire CX. If you’re unaware of what a CAS calculator is, it is a Computer Algebra System calculator. This means the calculator has the ability to do algebraic manipulations on variables, such as x + x = 2x. This is a great thing if you plan to take the SAT or AP Calculus, where this type of calculator is encouraged, but not so great if you are taking the ACT, where it is banned.

The TI-Nspire CX and TI-Nspire CX CAS have most of their hardware and functions in common. They’re so similar, it’d be easy to mistake one for the other, even after playing with it for a bit. However, the CAS version has a number of menus and submenus tucked away that you won’t find in the non-CAS version. In the past, the questions I’ve received about the Nspire CAS tend to be from TI-89 users wary of the the advanced calculus capabilities of the Nspire CAS. Since OS 3.0, differential equations and a host of advanced calculus features have been included for all TI-Nspire models.

While I’ve taken math courses all the way to a graduate level, my teaching experience only goes through second semester college calculus, so I can really only speak to classes at that level and below. In those classes, I’d much prefer the TI-Nspire CX CAS to a TI-89 Titanium. Even though the TI-89 Titanium (review) is an excellent calculator, the Nspire CX CAS is easier to work with on conics, has a much nicer UI, is easier for graphing, and has 3D graphing for a couple years now, a drawback that was a problem when the series was first launched, but no more.

Getting Started With Your TI-Nspire

If you find that you need a little help learning how to use your TI-Nspire, I recently started a line of books designed to help students and teachers learn how to use the calculator. TI-Nspire Tutorials Volume 1 is the TI-Nspire for Beginners, that helps you navigate all of the basic features of the calculator. TI-Nspire Tutorials Volume 2 is Using CAS Features Like a Champion, and will get CAS users started with those features only found on the CAS. Both books are currently available in Kindle format for the iPad, iPhone, Android, PC, and Mac.

Bottom Line TI-Nspire CX Review

At around $130, the TI-Nspire CX and TI-Nspire CX CAS not the cheapest graphing calculators available today, but they are well worth the price. When Texas Instruments debuted the TI-Nspire line a few years ago, it had a few warts, but with each year, they’ve continued to make massive improvements to both the hardware and software. Even at the beginning, I was impressed with how much faster kids caught on to features like fractions, graphing, and tables on the TI-Nspire than they did on the TI-84. From remedial Algebra through AP Calculus and my 2012 Illinois state championship math team, the TI-Nspire CX is my top choice for my students.

With the Nspire series, my students spent less time learning calculator code and more time learning math. Since the release of the TI-Nspire CX and continued OS upgrades, this is a fully mature platform. No longer can Texas Instruments users cling to the good old days of the TI-84 and TI-89 and feel like they honestly have the best the market has to offer. The future has arrived. The TI-Nspire CX is TI’s platform of the next decade.

Please buy your TI-Nspire CX on Amazon for the best price and FREE shipping. If you buy through this link, a small percentage of your purchase will help support my work at Tech Powered Math. Thanks for your support.

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Lucas Allen

Lucas Allen

For more than a decade, Lucas Allen was a high school math teacher and math team coach in Illinois. His 2012 Morton High School math team won the Illinois state championship. Recently, he made the jump from public education to the corporate world and is now working as a data scientist. He is interested in just about all forms of technology, including the TI-Nspire, Nexus devices, R, MOOCs, and more. You can follow , and if you are nice, he will probably follow you back.

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