This is the first release of a complex and new educational platform.  We are making the beta-version available at a discounted price to open up access while we continue to go through the optimization process.  Although we have done extensive pre-launch testing and bug-checking, some unexpected glitches may have escaped (just like the ED things don’t always go precisely to plan… like the last time we had to put in a Blakemore).  We also have additional features and teaching tools in the works that have not yet been added to this version of the platform.