Books in the Classroom
Carol Hurst's Children's Literature Site: Patterns and Picture Books
CarolHurst.com provides a sample chapter from Picturing Math, which teaches geometric concepts using picture books and activities.
Khan Academy
Khan Academy: Extend Geometric Sequences
Given the first few terms in a geometric sequence, find the next term in the sequence.
CK-12 Foundation
Ck 12: Elem Math: Predicting the Next Shape in a Sequence of Complex Shapes
[Free Registration/Login may be required to access all resource tools.] Students watch a video and try practice problems on identifying and continuing geometric patterns.
University of Cambridge
University of Cambridge: Nrich: Doplication
On this one page website sharpen your logic and pattern extension skills while working on this challenge. The solution is available to double check your solution.