AAPT's 2021 calendar is now available for a limited time! Use the stunning photos to demonstrate physics in your classroom. Each month features specially selected "Best of" entries from the AAPT High School Physics Photo Contest complete with explanatory text. Creative, educational and practical. As in the past, this calendar is made possible through the generous support of Vernier Software. Active members can receive up to 3 calendars at no charge. Shipping not included. Contact membership@aapt.org for pricing on additional copies. Product Code: CAL-21