Hello Tracker users,

The Tracker 5.0.6 upgrade is here and I recommend that you upgrade now for the Fall term. I've added path length L to the point mass data, made it easier to compare multiple tracks in plots, and fixed a bug when loading calibration points.

To upgrade click the green "Now available" button on the toolbar and choose Upgrade Now. If you don't see the button choose Help|Check For Upgrades.

Full installers are also available for Windows, Mac and Linux from both the Tracker home page (http://physlets.org/tracker/) and ComPADRE (http://www.opensourcephysics.org/items/detail.cfm?ID=7365).

As always, I encourage you to ask questions and/or report issues on this forum :-)  Doug