Lesson Plan Ideas (BetterLesson)
Find lessons through Core Ideas, Practices and Cross Cutting Concepts
STEMscopes: NGSS Unit Guides and Materials
Pinterest Next Gen Page
STEM from the Start/Quinks
The Inquiry Project (Grades 3-5)
NGSS Science Classroom Activities
A decent bank of "testable questions"
Science Buddies
Lesson plans exploring NGSS
Science A-Z
More lesson plans
mysteryscience.com
Seimen Science Day Activities
Performance Expectations and Planning by grade level
Units of study planning template