Teacher Review (Not based on classroom experience) Reviewer: Larry Denton, Jan 5 2008 03:09:06:563AM |

Review based on: personal experience |

Appropriate for: introduction to a concept |

Other Comments: Unfortunately, this tool improperly displays the function y=a(x-b)/(x-c) as "a" where c=b. Where c does not equal b, the discontinuity at x=c is displayed correctly. Although it would be interesting to let students explore the behavior of this function with the tool as is, and to see if any of them noticed the flaw, one should be careful not to leave any students with an incorrect impression. To avoid misunderstandings, the flaw should be corrected before the tool is made generally available. My evaluation would be far more favorable once the flaw is corrected. |

What math does one need to know to use the resource? Algebra 1 - Rational expressions |

What hardware expertise does one need to learn to use the resource? n/a |

What extra things must be done to make it work? n/a |

How hard was it for you to learn? Very Easy |

Explanation: I liked the simplicity of picking another target function. Using the sliders to find {a,b,c} was very simple and effective. In order for students to be able to successfully match the target function, I trust that the sliders and the target function parameters are most likely limited to integer multiples of one tenth. |

Ability to meet my goals: Very Ineffective |

Recommended for: Algebra: Rational Expressions |

Tool: Rational Equations Visualizer Review