A short description of concept mapping.
Kathy Schrock provides this comprehensive guide to concept mapping: http://www.schrockguide.net/concept-mapping.html
Articles by Joseph Novak, regarded as the originator of concept mapping as an instructional tool: http://cmap.ihmc.us/publications/researchpapers/theorycmaps/theoryunderlyingconceptmaps.htm and https://www.msu.edu/~luckie/ctools/ .
A bank of example lesson plans from Inspiration.com - http://www.inspiration.com/lessonplans/inspiration
A tutorial of how to use some of the concept mapping tools to make a map using technology.
CMAP - a free tool created by Joseph Novak - easy to use, and collaborative! http://cmap.ihmc.us/
VUE - Visual Understanding Environment, a free tool developed by Tufts University - http://vue.tufts.edu/http://vue.tufts.edu/
Inspiration, Kidspiration, and Webspiration - a commercial tool for K-12 schools, and well supported - probably the best known tool for concept mapping in schools. You can get trial versions of the software at http://www.inspiration.com/ as well as learn more about their iPad app versions.
Here is a list of concept mapping apps for tablets: http://www.teachthought.com/technology/25-top-concept-mapping-tools-for-visual-learning/