This document discusses themes related to 21st century learning at Avon Grove School District, including seven content thinking strategies, professional development plans, and how brain research relates to instruction. It provides an overview of how the limbic system and reticular activating system work and their impact on learning. Short and long term memory are examined, highlighting how much information can be held in memory at different ages. Finally, it lists some quick online tools like DIIGO, Jing, and Picasa that can be used to capture and share information.