The NSF-sponsored NanoSense project was created to address the question of how to teach nanoscale science at the secondary level.  This web site contains the materials developed by the NanoSense team, which include four comprehensive curriculum units to introduce teachers and students to nanotechnology.  Each unit has been classroom tested and provides extensive content support.  Users may download cost-free lesson plans aligned to national standards, Power Point lecture materials, student activity guides, and related assessments.  The materials were developed in a modular fashion to enable use for a short classroom introduction or a longer experiential learning project.  Topics include 1) introduction to nanotechnology, 2) light and matter interactions, 3) solar energy and nanoscience, and 4) the water crisis.