**FEATURES** |

So That's Why 22⁄7 Is Used for Pi!
*Maurice Burke* How students using graph calculators can explore rational number approximations to irrational numbers. |

Elementary Graphics and Animation with Your Calculator
*Kenneth Wolff* A discovery activity that connects mathematics and the world of entertainment. The activity combines geometric transformations with a calculator's DRAW, MATRIX, and PRGM features to generate visual reinforcement of mathematical concepts. |

An Odd Sum
*Ray Shiflett, Harris Shultz* The authors characterize those numbers that are the sum of consecutive of natural numbers and count how many such representations a given number has. |

Randomness, Statistics, and Pi
*José Binongo* Employing statistical tools to determine whether the digits of Pi are pseudorandom. The difficulties in answering this question are also discussed. |