Review The Nursing Process in Practice: Formulating a Family Care Plan, chapter 13, page 364.
Utilize the Box 13-7 Family Assessment Guide, pages 364-368.
Make sure to use all of the VI steps of the assessment.

Both the The Nursing Process in Practice: Formulating a Family Care Plan and the Family Assessment Guide. 
Simply read The Nursing Process in Practice: Formulating a Family Care Plan and answer the questionnaire from the the Family Assessment Guide.