There are many teachers in my district considering scientific explanations and instructional implications this year.  One of my considerations as I support this work is how to prevent explanations from becoming formulaic in the same way the MSP conclusion has become formulaic.

I think that the MSP Conclusion (and other written responses) became formulaic as teachers tried to understand the components, and a standardized scoring system.  I know that in the early days of the MSP, I looked for patterns in the prompts and scoring guides to help my students be more effective at this type of writing.  What I was missing however, was teaching the critical thinking skills necessary to make sense of the science.  Students didn’t need to do the sense making if they learned strategies to break down a data table, and write four sentences.  With the NGSS, I want to learn from the past and use the standards to support student thinking and sense-making in different ways.

Taking Science to School  and  Ready, Set, Science advocate four major goals in K-8 science education that have implications for scientific explanations:

  1. know and use scientific ideas
  2. generate and evaluate scientific evidence and explanations
  3. understand the nature and development of scientific knowledge
  4. participate productively in scientific practices and discourse

Looking to the Science & Engineering Practices, practice 6 details “Constructing Explanations and Designing Solutions”.  At each grade level, the bullets for the practice describe a broad, critical thinking skill.  For example at K-2:

  • use information from observations to construct an evidence-based account for phenomena
  • generate and compare multiple solutions to a problem

and at Middle School:

  • construct an explanation that includes relationships between variables
  • apply scientific ideas and evidence to construct or use an explanation
  • apply scientific reasoning to show why the data is adequate for the explanation

Moving into the Next Generation Science Standards, provides us with many opportunities to shift our instructional practices and re-evaluate our beliefs about science education.  Reading the few items above, opens the possibilities around scientific explanations.  They are about critical thinking and sense making more than writing a paragraph.  I encourage teachers to look beyond a single way for students to show what they know and explore the possibilities.   Students should be able to write a cohesive explanation that is grade level appropriate and connects evidence with scientific reasoning.  They should also be able to discuss these ideas with their peers, they should be able to distinguish between relevant and irrelevant evidence, they should be able to critique their explanation…the list goes on.  Explore the myriad ways for students to practice this Science & Engineering practice and lets work together to keep it from becoming a formula.


  • Taking Science to School. Duschl, Schweingruber, and Shouse, 2007
  • Ready, Set, Science. Michaels, Shouse and Schweingruber, 2008
  • Supporting Grade 5-8 Students in Constructing Explanations in Science. McNeill and Kracjik, 2012
  • Science & Engineering Practices, Next Generation Science Standards, 2013