The final part of a four part video companion to the NIFDI Press text Engelmann's Direct Instruction: Selected Writings from the Past Half Century has just been released on the NIFDI website. In this one hour video, Zig Engelmann and interviewer Evan Haney discuss the fourth section of the book, "Responding to Criticisms and Roadblocks." Engelmann comments on the highlights of each of the five papers, selected from his writings ranging from 1999 to 2010. Included are a response to the High/Scope Preschool study, a commentary on the pitfalls of calling a program research-based without actually doing research on the program and a critique of the Common Core State Standards for Math. View the videos here, and pick up a copy of the book here.