From Achieve (nextgenscience.org):
"The Classroom Sample Tasks blend content, practices, and concepts from both the NGSS and the Common Core State Standards. Teachers across the disciplines have collaborated to write sample tasks, which are the result of a vision of integrating science, engineering, and mathematics for classroom use."
We have adapted the middle school and high school sample assessment tasks published by Achieve and are making them available for teachers implementing the Next Gen Science Standards.
Here are the Middle School Sample Tasks on Tuva:
2. Four Cities
3. Ocean Waves
You can find all the classroom sample tasks on the NGSS Tasks page.