Blake,
One idea is teams - teaming up stronger with weaker students when questioning. A variation is assigning these teams beforehand with homework, prepared to discuss the next day. Another idea is to "randomly" select students to come to the white board to be a transcriber, writing your words. Although weaker as an exercise, it's a way to engage the quiet ones, and involves multiple senses. If your class takes a break mid class, you could also require each student has to give a correct answer before exiting the classroom. Really anything you want to do, can be effective if you institute it with an attitude of fun, creativity and student learning and engagement as the motivation.
Barry Westling