The library's Research Process guide is a step-by-step discussion of the research process, from how to choose a topic and narrow down a research question, through research and writing, and on to citation and ethical use of information. Use this guide with your students to introduce the concept of research as a multi-step undertaking.
Use this video (1:36) to assist your students with understanding how to move from broad topic to focused research question.
This video explains how to create complex search strings to narrow down your results when searching databases.