The first time I ever heard of a lapbook was on a Five in a Row Yahoo group (that should tell you how long ago I started homeschooling), so I had not actually seen one in person. When I had the opportunity to attend a seminar by Tami Duby of Tobin's Lab on how to create lapbooks, I was first in line. Lapbooks are paper manipulatives using file folders in which the student stores creative summaries of their work.
The concept is similar to notebooking and some notebooking resources can be used in lapbooks, but the concepts do differ. Lapbooks are more than just notebooks with collections of worksheets, they are diagrams, minute books, and other paper manipulatives customized to emphasize the subject of the lapbook.
Dinah Zike's science unit studies and Eagle's Wings curriculum (Considering God's Creation, God's Amazing Acts, and others) are excellent worksheets to use in lapbooks, as are the many notebooking forms found on the Highland Heritage website.
This video from Knowledge Box Central is a good visual explanation of lapbooking:
The following websites have some great information for those interested in creating lapbooks, including many photos:
Homeschool Helper Lapbooks - From Money to Chemistry, you will find a variety of lapbooks with downloadable pages at Homeschool Helper.
In The Hands of a Child - sells project packs for creating lapbooks and has lots of links to photos of lapbooks (click on Links at the top)
History Through the Ages - maps, timelines & timeline figures, and many more paper manipulatives for lapbooking all things history
Mini-books, Flaps, and Student Folder Websites - links to sites with instructions to make all kinds of mini-books and manipulatives for your lapbooks
Master List of Lapbooks (Homeschool Share) - Hundreds of lapbooks with content downloads compiled by Homeschool Share
Tina's Dynamic Homeschool Plus - Information about lapbooking, notebooking and unit studies and is designed for the middle or high school homeschooler. There are also a number of resources for the elementary age homeschooler.
A Journey Through Learning - Topical lapbooks for all subjects and lapbooks for various popular homeschooling curriculum/programs; the video below gives more information about A Journey Through Learning's lapbooks.
Knowledge Box Central (affiliate link) - More lapbook kits for sale
Minibooks - A collection of minibook tutorials
WorksheetWorks.com - This very cool worksheet website is still in Beta development but I had no problems with it and am impressed with not only the range of worksheets but the ability to select difficulty level for creation and instant download. In addition to the instantly generated downloads, there is a collection of graphic organizers under Miscellanea that are not only useful for thought organization but would work very well for notebooking and lapbooking.
Lapbooking 101 - This blog has a wealth of resources for lapbooking.
Lapbooking Groups on Facebook - Results of a search for lapbooking groups on Facebook (note that not all results relate to lapbooking as described above; other uses of the term may appear in the results)