Once the software is installed on your computer you need to plug your calculator in with a usb cable that has a mini-usb cable connector on the calculator end. Launch the TI software and plug in the calculator and turn it on. Then click on the TI Software Calculator Explorer and drag and drop the programs that have been unzipped on to the connected calculator and follow the prompts.
Useful Programs for SAT / ACT / Algebra Classes (zip file) are available HERE.
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