What does it mean for teachers to integrate technology effectively? Effectively integrating technology means teaching "with" not "near" technology. The author defines "teaching near technology" (Leatham 2002) as using technology in a manner that does not promote opportunities for students to communicate, reflect, and…

In the criminal justice system, defendants accused of a crime are presumed innocent until proven guilty. Statistical inference in any context is built on an analogous principle: The null hypothesis--often a hypothesis of "no difference" or "no effect"--is presumed true unless there is sufficient evidence against it. In this…

To create an environment in which all students have opportunities to notice, describe, and wonder about variability, this article takes a context familiar to many teacher--sampling colored chips from a jar--and shows how this context was used to explicitly focus on variation in the classroom. The sampling activity includes physical as well as…