There are quite a few resources that provide an overview of homeschooling and provide general curriculum ideas. So many that it can be very overwhelming. These are the ones that I found to be the the most helpful:
The Unschooling Handbook : How to Use the Whole World As Your Child's Classroom by Mary Griffith
Griffith's book is helpful, whether or not you are unschooling. It provides lots of ideas and resources on how to integrate learning into non-scheduled curriculum. The book is great for when you want to provide opportunities outside of the formal schedule, but still want the opportunity for your children to learn.
Home Learning Year by Year: How to Design a Homeschool Curriculum from Preschool Through High School by Rebecca Rupp
I appreciated Rupp's book for the outline of resources for learning. While the book is dated, many of the resources are still useful and it provides a general idea of what to plan for in each grade. This is especially helpful if you developing learning materials on your own or are making changes to your current curriculum.
Core Knowledge Sequence Content and Skill Guidelines for Grades K–8 from Core Knowledge Foundation
From the author E. D. Hirsch, Jr. of Everything Your X Grader Needs to Know and Cultural Literacy, came the Core Knowledge Foundation. The Core Knowledge Sequence is a list of all the sources from the Everything Your X Grader Needs to Know texts. This list is beneficial, as it provides a general outline of what students are expected to know and in which grade they should learn it. This can be helpful in creating your own curriculum, as it can give you ideas on what may be appropriate for your children. CK also provides resources for teaching in the Teaching Guides section. (Free resource)
World Book Scope and Sequence PreK - 12 - This is another perspective on what a child learns when. This can also be helpful if you are trying to figure what what you might want to start with, when evaluating you child's learning styles. (Free resource)