Identifying or comming up with research questions can be diffcult. These sites can give you some practical tips...
Research Problems and Solutions
Practical tips for identifying a research problem.
Issues and Problems
A recent book that identifies types of current educational issues that researchers might study.
Independent and Dependent Variables
A lucid explanation of independent and dependent variables.
Developing a Problem Statement
Characteristics of the problem statement.
Qualitative Research Proposals
A guideline for developing qualitative research proposals.