Blog
Guides and worked examples for getting more out of the calculator.
July 31, 2026
How to Download and Install Games on a TI-84 Plus CE
The real process for getting games onto a physical TI-84 Plus CE — TI Connect CE, where to find legitimate program files, and how to actually launch one afterward.
July 30, 2026
How to Do Factorial on a TI-84
Where the factorial operator lives on a TI-84 Plus, the syntax for typing it directly, and the domain and overflow limits worth knowing before you rely on it.
July 30, 2026
Is a TI-84 Allowed on the ACT or SAT? Calculator Rules Explained
Which calculators the ACT and SAT actually permit, where the TI-84 Plus CE and TI-30XS fall, which TI models are banned, and what changes on the digital versions of each test.
July 27, 2026
How to Use a TI-30XS Calculator: The Basics
A beginner's walkthrough of the TI-30XS Multiview — entering expressions, the fraction/decimal toggle, trig and log functions, and memory.
July 27, 2026
TI-30XS Calculator Reference Sheet: Keys & Functions
A quick reference for the TI-30XS Multiview's keys and functions — fractions, trig, logs, powers, percent, and memory.
July 26, 2026
TI-84 vs TI-84 Plus vs TI-84 Plus CE: What's the Difference?
How the original TI-84, the TI-84 Plus, and the TI-84 Plus CE differ — screen, battery, memory, and why the function set has stayed the same across all three.
July 25, 2026
TI-30XS vs TI-84 Plus CE: Which Calculator Do You Need?
TI-30XS Multiview or TI-84 Plus CE? A feature-by-feature comparison covering exam rules, graphing, and which one actually fits your class.
July 5, 2026
How to Make a Residual Plot on a TI-84
What a residual plot is actually checking for, and the workflow for building one on a TI-84 from a linear regression's predicted values.
July 4, 2026
How to Find a P-Value on a TI-84
How p-values are generated on a TI-84 through the STAT TESTS menu, what they mean, and a worked example with a 1-sample Z-test.
July 3, 2026
How to Delete a Program on a TI-84
How to delete one program on a TI-84 Plus without wiping everything else, plus the memory-management view for clearing several at once.
July 2, 2026
How to Find the Correlation Coefficient on a TI-84
How to get the correlation coefficient (r) from paired data on a TI-84 using linear regression, and how to read its sign and size.
July 1, 2026
How to Find a Z-Score on a TI-84
The z-score formula, how to compute it on a TI-84 by hand from 1-Var Stats output, and how it connects to the calculator's normalcdf and invNorm tools.
June 30, 2026
How to Find Standard Deviation on a TI-84
How to calculate standard deviation on a TI-84 using 1-Var Stats, and why the calculator gives you two different standard deviations at once.
June 29, 2026
How to Do a Cube Root on a TI-84
The dedicated cube root shortcut on a TI-84 Plus, how it differs from the general nth-root menu, and how to type it directly as an expression.
June 28, 2026
How to Graph on a TI-84 Plus: A Beginner's Walkthrough
The full workflow for graphing a function on a TI-84 Plus — entering the equation, setting the window, and using Zoom and Trace to actually read the graph.
June 27, 2026
How to Do Absolute Value on a TI-84 Plus
How to type absolute value on a TI-84 Plus using abs(, what it actually returns, and a worked example with a negative expression inside.
June 26, 2026
How to Do Fractions on a TI-84 Plus (▸Frac and the Fraction/Decimal Toggle)
How to make a TI-84 show an answer as a fraction instead of a decimal, using the ▸Frac conversion — including why some decimals won't convert cleanly.
June 25, 2026
How to Reset a TI-84 (What Each Reset Option Actually Clears)
The three reset levels on a TI-84 Plus — RAM, Defaults, and Archive — what each one wipes, and which one actually fixes a frozen or misbehaving calculator.
June 20, 2026
How to Solve Quadratic Equations on a TI-84 Plus CE (Step by Step)
How to solve quadratic equations by hand and on a TI-84 Plus CE — what the discriminant means, and why some roots come out as complex numbers instead of real ones.
June 2, 2026
How to Graph a Circle Using Parametric Equations
A circle isn't a function of x — here's how parametric mode lets you graph one anyway, plus why it's the right tool for any curve that doubles back on itself.
May 12, 2026
Degrees vs. Radians: When to Use Each Angle Mode
A practical guide to choosing between degree, radian, and gradian mode on a graphing calculator — and why the wrong mode gives you a wrong-looking answer, not an error.