These resources are available free to educators and individuals preparing for the naturalization exam.
For Naturalization Exam Learners:

USCIS - ESOL Lesson Plans for Instructors

U.S. Citizenship and Immigration Services provide instructors with free lesson plans and teaching strategies for to prepare students for the naturalization exam.

Lessons include:

• Understand Government (Legislative, Executive & Judicial)
  
  
• Bill of Rights
  
  
• Fighting for Our Rights

USCIS - Civics & Citizenship Toolkit

U.S. Citizenship and Immigration Service present educators the Civics & Citizenship Toolkit.  The toolkit offers instructors with a collection of programs via publications, handbooks, multimedia tools, etc to assist you in developing content for your class and to provide basic information to your students.

Citizenship Resource Center
U.S. Citizenship and Immigration Service presents students, teachers, and organizations with the Citizenship Resource Center. A resource center that provides citizenship preparation materials and activities.

Adult Citizenship Education Strategies for Volunteers
U.S. Citizenship and Immigration Services offers a series short training segments that will provide volunteers in adult citizenship classrooms the basic strategies to assist applicants in preparing for the naturalization interview and exam.

Tip Sheets for Instructors
U.S. Citizenship and Immigration Services provides tip sheets to assist instructors with basic educational strategies to prepare students for the naturalization exam.

Elements of Program Quality  
U.S. Citizenship and Immigration Services provides an outline that describes the key components of a high-quality English as a Second Language and citizenship instruction program.