I never like writing an annotated bibliography. It seemed like a lot of busywork to me. Then I read student papers where they "researched" and came up with exactly the required three academic sources that perfectly fit their thesis and analysis. Never mind that the three articles were totally unrelated, questionable, and handy full-text and downloadable...
So I started requiring ten sources on a MLA format annotated bibliography that includes 3-4 sentence summaries of the articles and 2-3 sentences about how the article relates to the student's project. These are worth 20% of the grade and are due at the conference. They can sign up for a conference anytime this week (yes, Friday is filling fast).
Those who do this thoroughly tend to write excellent papers. Those who can't figure out where to find a source yet and have missed a couple of classes lately -- are in big trouble. This is also one-to-one so they either face it, or avoid it. Avoidance at this stage carries a significant penalty.
But it seems to work. In addition, the papers that result after wider searches for academic sources? Much better. They usually have some scope and depth. Still, resistance reigns.