Two Tutoring Sessions or One Month of Tutoring from Teach Educators and Scholars Organization (Up to 53% Off)

Philadelphia

    Select from Options

Buy!
Processing... Please wait
Limited time remaining!

In a Nutshell

Experienced tutors design customized learning plans for grades K­–12

The Fine Print

Promotional value expires 180 days after purchase. Amount paid never expires. Valid only within 55 miles of zip code 08016. Appointment required, 48 hour advance notice required. Registration required. Limit 1 per person, may buy 1 additional as gift. Valid only for option purchased. Merchant is solely responsible to purchasers for the care and quality of the advertised goods and services.

Choose Between Two Options

  • $107 for two academic-tutoring sessions ($205 value)
  • $220 for one month of academic-tutoring services, which includes six sessions ($465 value)

Both options include the $75 registration fee and a free initial consultation. Tutors will travel to the student’s home or an agreed-upon location for hour-long sessions of one-on-one tutoring with customized learning plans for grades K­–12.

Pocket Calculators: Bite-Sized Binary

Doing math is much easier with a calculator in your hand, but what’s really happening under those buttons? Read on to learn more about the complex calculations happening inside.

Few modern inventions are as taken for granted as the calculator. Today’s calculators are so small as to be practically forgotten, tucked away in a pocket or the apps folder of a smartphone. But despite the compact size, a calculator’s functions are surprisingly complex—the collaboration of several electronic circuits working together is needed to arrive at something even as simple as 2+2. When a user presses the buttons of a calculator, a chip inside translates each input into a binary number—a series of 1s and 0s—which it can more easily store in memory and send through a variety of built-in functions. Each function exists on an integrated circuit with its own logic and assortment of tiny counting beans. At the end of the calculation, the processor translates the binary solution back into a legible number and sends it to the calculator display. Heck, even the display is controlled by binary logic, which is why the numbers commonly consist of segmented lines. Each part of every numeral can be turned on or off according to the processor’s instructions.

All this work happens so quickly and seamlessly we barely think twice about it. But only a few decades ago, the digital calculator was a revolutionary device—a mash of circuits and displays the size of a cash register and the cost of a midsize car. Before the 1960s, the only tools used to make personal calculations were objects such as the abacus and, beginning in the early 19th century, a variety of crude mechanical computers that used wheels and cogs to carry about basic arithmetic. Sharp unveiled the first desktop calculator in 1964, but it wasn’t until the development of the microprocessor a few years later that engineers could begin to create pocket-sized versions. Nevertheless, calculators remained an expensive novelty for quite some time. A 1971 commercial for the Sharp EL-8, one of the first handheld calculators, touts its “price tag to match”—the low, low price of $345.


By purchasing this deal you'll unlock points which can be spent on discounts and rewards. Every 5,000 points can be redeemed for $5 Off your next purchase.
{}