Cought some good ideas on Wei Zhai blog:

"When students are under the pressure of implementing a technological application without receiving scaffolding that leads to their understanding and experiencing its usefulness, the technology is in for loss of its purpose...

...Richardson suspected that “by its very nature, assigned blogging in schools cannot be blogging. It’s contrived”.
He pointed out that students are blogging for the sole audience, the teacher, and when the course is over, they “drop blogging like wet cement” (as cited in Downes, 2004). In this case, students are not necessarily interested in using blog for learning probably because in the first place they haven’t been helped to develop this interest (Zhai, 2004).

Here is where teacher missed an important perspective: a new technological tool should converge with student interests. Technology is expected to be a facilitator rather than a burden for students learning.

...It is OK to introduce new educational technology to students but they need questions asked that will help them understand why they are doing what they are doing, they need guidance on how to use the technology, and they need to be convinced why they will gain benefit from using this technology. Teachers can not just thrust upon their students technologies, one piece after another, because soon, they will get fed up with so many weird stuff that doesn’t make sense at all."