If you made a mistake on the triangle section of the sprint, transcribe the correction text for the appropriate triangle. If you are an oldbie, transcribe the text 5 times otherwise, transcribe it 3 times.

MATH*Ability is a basic math program that teaches children how to master basic arithmetic skills. The program has developed a successful track record and is available via email.

A meteor slammed into Russia last week. Within the week, Stefan Geens, used basic trig to plot a flight path for the meteor..

He posted a Google Earth KMZ file that shows his plot. I've taken that KMZ file and added the Korkino cement factory data as well as an overlay of a satellite photo published by the Baltimore Sun

I used the boundary printed on the satellite photo but have adjusted it southward while maintaining its rotation to fit the work Stefan has done. If the satellite company that provided the photo to the Sun was precise in placing the boundary, the meteor wouldn't have passed over Korkino as several videos show it did. My revision of his KMZ file is here.

Here's a static image taken from the KMZ file.

I've uploaded a few Mathematica Demos that illustrate some Middle School topics.

The Wednesday sprint key is here.

To register in the Khan Academy, follow these instructions.

This homework is for all students regardless of how well you did on the triangle problem. It is due on Friday, Apr 8.

The usual 10 x rewrite rule applies to all questions except for the triangles.

If you missed either of the two triangles, follow these instructions.

The 10 x rewrites are due by Wednesday, the triangle assignment is due Friday.

To enter your Mathcounts Answers, click here.

To see which answers were right and wrong, click here.

Correct answers are marked with a check mark, and incorrect answers are marked with an 'X.',

Here are the 3 currently available workbooks:

1. Volume 1 of the 2010 Mathcounts workbook.
2. Volume 2 of the 2010 Mathcounts workbook.
3. Entire 2006 Mathcounts workbook.