If a graphic calculator is somewhere on your list, consider this 12% discount on the Texas Instruments TI-84 Plus graphing calculator. Building on the hugely popular TI-83 Plus, which is perhaps the best-selling calculator of all time, the TI-84 Plus is completely compatible with its predecessor. From that well-established platform, this new model adds more speed (a processor that’s 2.5 times faster), more memory (24 KB RAM and 480 KB of Flash ROM), an enhanced high-contrast display (eight lines by 16 characters), and more Apps. Newly added “USB on the go” feature lets you share with other calculators, or connect to a PC or presentation tool. Ideal for middle school through college. The TI-84 Plus currently averages 4.5 out of 5 stars on Amazon from over 2,900 customers (read reviews). Save 12% off the regular $100 list price on Amazon, and buy it now for $88. Oh, and it might not hurt to drop this in your cart while you’re there: Ti-84 Plus Graphing Calculator For Dummies.