Another web-based resource I would like to reference is one developed by John Spiegel from San Diego COE and various district colleagues in San Diego County. It is a great search engine which allows a teacher to select a disciplinary core idea, grade level, resource type and resource use, to identify an engaging phenomenon that can be used in NGSS lesson development.
Check it out! Searchable Phenomena for NGSS Lesson Development
Thanks to John for developing this great resource!