Is Classroom Technology 'Half-Baked'?

In a recent Classroom Tech column, Alan Warhaftig writes that the implementation of technology in schools is often "half-baked, with too little effort to identify effective practices and belated consideration" of the costs of maintenance. As a result, he says, "many fine teachers don't use instructional technology much," because they aren't convinced it will improve learning.

What's your view? Has instructional technology helped you as a teacher? Why or why not? What's the most effective use of technology in the classroom?