Blackboard funktioniert nicht

And the free diese App app makes it easy to save, organize, search, and share your work, doodles, designs, lists, and more.  diese App™ by Boogie Board™ is an electronic writing tool to plan, sketch, and design featuring Liquid Crystal Paper™.  The diese App app archives your work as images or PDFs and makes sharing to E-Mail, Messages, and more a cinch.  The diese App app automatically tags your work, making organization and search a breeze.  The diese App app includes tools to draw, highlight, and enhance your work.  With Boogie Board’s Carbon Copy Pen and Smart Template, you can digitally save all your creations as you write and stream them to your mobile device with this app.  The diese App app uses your mobile device camera to scan your diese App.  You will never lose a great idea again!