IDM inquiries. Here is a link to shared inquiries:
http://www.c3teachers.org/inquiries/

Teach Like a Champion is a great book to use with teachers from all levels of experience. Includes some great questioning strategies to get all students engaged in questioning. Here is a summary:
http://www.themainidea.net/tmi_pdfs2/THE%20MAIN%20IDEA%20–%20Teach%20Like%20a%20Champion%20–%207-10%282%29.pdf

Teach Like a Champion is a great book for working with teachers from all levels of experience. It has some awesome strategies for questioning. Here is a link to a summary of 49 strategies! http://www.themainidea.net/tmi_pdfs2/THE%20MAIN%20IDEA%20–%20Teach%20Like%20a%20Champion%20–%207-10%282%29.pdf