What is remarkable, in my opinion, is that he does - with some friends - all the work for free (at least for the time being). I have asked my students to visit the site in case they have been absent or wish to do some revision work.
I participated in a prep chat on physics matriculation exams. Students could ask questions via IRC and teachers answered them while having a Skype conference with each other. This way we could discuss the questions and decide which of us would answer a certain question. It was fun!
Regards,
Antti Savinainen, PhD
Finland
--
*************************************************************************
Viesti on tarkastettu roskapostinsuodatus- ja virustorjuntaohjelmistolla.
*************************************************************************