Concept and skill detail section (pg 2 & 3 of this example) provide specific concepts by core idea (rows) and grade-span (columns).
Narrative storyline provides an overview of how student ideas develop across grade spans.
Read concept and skill detail section from left to right, from initial ideas (pre-instruction) to culminating scientific ideas (high school).
Possible misconceptions, placed in the grade span before they are addressed, are highlighted gray.
Stepping stones move students from initial ideas to scientific understanding (read each grade-span cell in its entirety).