There are many ways that tablet, screen writing and screen capture technology can be used in lectures. For instance it is possible to write on lecture slides, using the ink facility in PowerPoint (or a tool like PDF annotate). The files can then be saved and distributed after the lecture. Then recording using tools like Camtasia provide students with an indication of how the lecture transpired.
Students can also use the approach to create study notes, or even send mathematical notes to teachers for feedback? The use of multiple desktop sharing tool like SynchronEyes, (or Dyna or Classroom Presenter or Starboard) to see students’ work in the lecture and anonymously upload that to the screen allows students’ screen writing to be shared for a more interactive learning experience.
For an iPad you can get a pogo stylus and use IannotatePDF or Infonetpresent or GoodReader. (Eprojector for your iphone allows you to use your iphone as a remote control for your powerpoint presentations.)