In the interest of brevity (see blog by Morgante Pell on teaching students to say a lot using a little), I will comment quickly. Blog reading is different because it is chaotic, somewhat non-linear, repetitive, and sometimes interactive (if the blogger responds to comments). Similar in that it’s an exchange of information. Blog writing differs because it’s somewhat short, shares similarities because it’s written in paragraphs. Commenting equals more viewpoints. See Dan Meyer’s blog on why teachers shouldn’t assign homework. Blogging helps learning by giving people a chance to experience those different viewpoints and then synthesize and express their own opinions.