Introduction to Tray Waste Data Collection Techniques

Healthy Food Choices in Schools November 17, 2017 Print Friendly and PDF

food waste

Do you want to dig deeper into understanding what students are actually eating? It’s not nutrition until it is eaten, which is why we invite you to join us on the Technical Advising Professional’s Webinar Introduction to Tray Waste Data Collection Techniques. In this webinar, we will introduce the Quarter-Waste Method which is nearly as precise (90% reliability) as weighing. The method involves a visual estimation of food remaining on a student’s plate or tray.


Candice Sainz, Dairy Council of California


Deborah Tamannaie, California Department of Education; Katherine Greene, Cornell BEN Center; Kussy McKenzie, UC San Diego; Candice Sainz, Dairy Council of California

Photo from Flickr:"Food Scraps" by MPCA is licensed under CC BY 2.0


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This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.