world-shaker:

There’s some outstanding advice in here, but this is one of the most important steps:

2) Understand why and how you’ll use it in your class. This may sound obvious, but poor lesson planning will result in problems including misbehavior, technological breakdowns, and angry administrators and parents. My advice for beginners is to look at blogging as 10% of your syllabus – use a blended learning approach which incorporates blogging as a minor supplement. As you progress, you’ll get more comfortable to change the ratio as you see fit.