You may already be familiar with any of the following resources...

General
- Gifted Homeschooler's Forum (GHF), especially the resources listed under the "Favorite Things" tab
- Davidson Database, Resources by Subject Area
- Hoagies Gifted Education Page
- Library of Congress (LOC)
- Khan Academy
- Mensa for Kids
- The Kid Story, info gathered and reposted in a blog format by a gifted kiddo

Language Arts
- Language Arts Curriculum by Michael Clay Thompson
- For expanding vocabulary, there are multiple Word-Of-The-Day e-mail lists
- Author Jan Brett offers activity pages, including Dolch Sight Words
- Reading lists by age, under "Recommended Resources" on this Gifted Issues Discussion Forum.
- Every Good Book, enter criteria to generate reading lists
- Lexile Find-A-Book, enter criteria to generate reading lists
- Scholastic book wizard, enter criteria to generate reading lists

Math
- Art of Problem Solving (AoPS) math
- Life of Fred (LoF) math. Addresses the common kids' question, "when will I ever use this?": Begins each lesson with a problem which needs to be solved... then introduces the math. Does this in the context of a silly story. Is values-based (religious overtones).

Science
- Online Labs
- Neuroscience for kids (NFK)
- Theodore Gray Periodic Table of Elements (website, book)

Drawing
- great old thread on drawing books
- Doodle 4 Google, annual contest (2016 competition opens Sept 14)

Hopefully through this brief roundup and other sources, you will find things to support your children's interests and passions, and meet them at their current developmental level.

There are many discussion threads on the forum which point to educational resources... including Good online science instruction for high school?.