Douglas Llewellyn focuses on teaching science through an inquiry-based process, showing teachers how to implement inquiry using the three "Rs" of inquiry-restructuring, retooling, and reculturing. Inquire Within helps teachers design inquiries for their students and also provides ready-to-use inquiry lessons. Updates to the Third Edition include:

Alignment with the new Common Core State Standards and the Next Generation Science Standards
A central focus on making and defending scientific arguments (i.e. argumentation)
Guidance on developing the prerequisite attitude and mindset for becoming an inquiry- and argument-based teacher
How to balance the meaning (the disposition) as well as the mechanics (the how-to) of inquiry and argumentation
Background on self-directed learning
Practice in climbing the ladder of professional improvement
Many new vignettes of inquiry and argument-based activities that integrate language arts with science.
New sections tie inquiry-based instruction to classroom management, language literacy, the nature of science, multiple intelligence, communication skills, and scientific argumentation.
The Third Edition is now closely aligned with Teaching High School Science Through Inquiry and Argumentation