Grade levels: Senior High (10-12)

Business developer, gun control advocate and former politician Bill Marovitz.

The seven powerhouse musicians of Leahy present their lively performance, a rich mix of Celtic traditions and contemporary savvy.

Acrobatic circus troupe 7 Fingers.

Molecular geneticist Steve Scherer.

Chris Wood, author of Dry Spring: The Coming Water Crisis of North America.

Writer Richard Preston.

Donald Yeomans, Senior Research Scientist at NASA.

Alfons Weersink, Professor, Department of Food, Agriculture and Resource Economics, University of Guelph.

Esteemed food critic Gina Mallet.

Journalist and author James MacKinnon.