This 60-minute live professional development Web seminar for educators will be on April 2, 2012, at 8 p.m. EDT. Learn to use the distance formula and the Pythagorean theorem to determine the minimal path and minimal time for a lunar rover to perform tasks on the surface of the moon. Participants should have a basic knowledge of scale factor and application of the Pythagorean theorem. Having access to a calculator is helpful but not necessary for session. For more information and to register online, visit https://digitalmedia.wufoo.com/forms/nes-webinar-registration-pythagorean-theorem/.

Electromagnetic Spectrum: Remote Sensing Ices on Mars Web Seminar

This 90-minute Web seminar will be held on April 3, 2012, at 8:15 p.m. EDT. Learn how to use authentic NASA mission data to investigate the composition and distribution of ices in the high latitude regions of Mars through analysis of visible light, infrared light and gamma rays. The seminar includes information about a unique student extension activity, where students access a free computer simulation illustrating how gamma rays are used to determine the chemical composition of Mars. For more information and to register online, visit http://learningcenter.nsta.org/products/symposia_seminars/NES2/webseminar1.aspx.

Properties of Living Things: Searching for Life on Mars Web Seminar

This 90-minute Web seminar for educators will be on April 5, 2012, at 6:30 p.m. EDT. Review criteria for determining if something is alive and learn how students can apply the criteria in a hands-on activity. A video will be shown that connects the activity to a NASA mission. Collaborate with other participants about ways of using and adapting the activity. Extension activities for students interested in the topic will be provided. For more information and to register online, visit http://learningcenter.nsta.org/products/symposia_seminars/NES2/webseminar7.aspx.