I recommend the article "Thinking Like a Historian: A Framework for Teaching and Learning" by Nikki Mandell. The article, appearing in the April 2008 issue of OAH Magazine of History, outlines the theoretical reasons for teaching students why they should engage in historical inquiry and provides guiding scaffolds for assisting students through the process.
I recommend "If Pictures Could Talk, If Walls Could Whisper: Revolutionary Practices that Engage Students in History," a slideshow presentation delivered by Delise Sanders at the National Council for History Education Conference in 2008. The conference slides introduce teachers to methods for helping students develop an understanding of an appreciation for primary sources. Using many student-made and literature-based examples, Sanders suggests starting with student projects focusing on their own lives, moving toward local history, and eventually studying broader national historical topics.