Texas Instruments TI-1706 SV Calculator

• Amazon now offers the Texas Instruments TI-1706 SV calculator, now priced at $6.13 (was $10.00).
• Prime members get free two-day shipping, and regular members get free shipping on orders over $35 within the contiguous U.S.
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Editor's Pick: Great for homework or everyday budgeting. The keys provide clear tactile feedback, and the color-coded layout makes it easy to find numbers and function keys. The sign change key lets you input negative numbers without hassle, and the square root key is handy during tests. It runs on solar and battery backup, so it won't die on you unexpectedly. It also comes with a sliding cover—just snap it on and toss it into your pencil case when you're done.