The debate over use of calculators in the math classroom has gone on for decades. I believe that calculators are handy tools for checking one's work. Many would argue that calculators cannot replace basic arithmetic skills. I agree with this notion as well. For example, when teaching students how to find factors and greatest common factors of composite numbers, these whole number operations are the object of instruction. In this case, it would not be appropriate to use a calculator except to check one's work (which can be done manually if necessary for this task).

However, there are many time when calculators can be used as effective problem-solving tool. For example, when teaching students how to factor large whole numbers such as 621, the problem solving is the object of instruction, not the calculations. In this case, using a calculator can help students to find all factors quickly, and to determine if such a number is prime or composite.

I have created some interactive calculators, solvers and generators, including:

Math
Calculators |
Description |

Arithmetic Operations | This calculator allows you to perform simple arithmetic operations with whole numbers and decimals. |

Circle Solver | Our circle solver lets you enter the area, diameter or circumference of a circle and then solves for the other two. |

Circumference Calculator | Find the circumference of a circle by entering it's radius. |

Loan Payment | Compute your monthly loan payment after entering the principal, interest rate and number of years of your loan. Works for car loans and mortgages. |

Quadratic Equations Solver | Find the roots of a quadratic equation with this interactive solver. This tool is great for checking your work on complicated problems. |

Random Number Generator | Generate a random number between one and a number of your choice instantly. |

Custom Random Number Generator |
Generate a random number between two numbers of your choice instantly. |

Roman Numeral Converter | Convert a whole number into a Roman Numeral with this handy tool. |

Square Root Calculator | Find the square root of a number you enter with this interactive calculator. |

Triangular Numbers | Find any triangular number interactively. |

Check them out and let me know if you have any to add. You can find me on Facebook.