The first three OpenSciEd units for middle school science have been officially released. All three of these units were independently reviewed by Achieve's Science Peer Review Panel and are listed as examples of quality materials on the nextgenscience.org website. Two units earned the NGSS Design Badge. Each unit is approximately six weeks of class time and all teacher and student materials are free and openly licensed. See the unit materials and corresponding EQuIP Rubric for Science reviews here:
National Middle Level Science Teacher's Association
"NMLSTA" is a 501(c)3 non-profit organization.