As Google has updated their Chrome versions, Math In Focus is no longer compatible with Chrome.  Use Internet Explorer when using Think Central / Math in Focus with a SmartBoard.  It is found in the start menu under "Windows Accessories"

The site log in is:

NOTE: Internet Explorer & Microsoft Edge have similar-looking icons.  Edge will NOT work.  The Internet Explorer icon is light blue with yellow.  It likely is not be showing in your taskbar.