Opinion Blog

Finding Common Ground

With Peter DeWitt & Michael Nelson

A former K-5 public school principal turned author, presenter, and leadership coach, Peter DeWitt provides insights and advice for education leaders. Former superintendent Michael Nelson is a frequent contributor. Read more from this blog.

School & District Management Opinion

The Difference Between Data and Evidence: What School Leaders Need to Know

Just collecting the information is insufficient
By Peter DeWitt & Michael Nelson — December 15, 2024 4 min read
Screen Shot 2024 12 13 at 7.40.48 AM
  • Save to favorites
  • Print

Leaders often tell us that they collect a plethora of data but do not always find the time to look at it, much less talk about it with staff and use it to take actionable next steps. That’s unfortunate, because conversations around data can help lead to shared understanding and a deeper impact on student learning. When used correctly, data, say on student learning, can help teachers define what students need, like stronger tier one instruction. That will then require teachers to develop a shared understanding about what tier one instruction looks like and how it can best help with the issues on student learning they are seeing in their classrooms.

Additionally, collecting and using school-processes data, such as on professional learning communities, can help leaders and teachers understand whether PLCs are working or not and how to improve on them.

In our work, we focus on three areas with leaders and teachers that will help foster collective leader efficacy (CLE): developing a shared language, engaging in joint work, and collecting and using evidence of impact (data).

Over the years, “data” has definitely become a four-letter word in the minds of teachers and leaders because it’s been used as a hammer and not a flashlight (check out our video about that here). The central focus for these three areas are typically around a priority, or goal, for a school improvement plan.

When we engage the leaders, teachers, and their teams we work with, we find that they don’t always differentiate between data and evidence in the third part of the definition. This is where we dive into building a shared understanding of what both words mean.

Data refer to raw facts, figures, or information collected from observations, measurements, surveys, tests, or other sources. In an educational setting, data can include test scores, attendance records, survey responses, or classroom-observation notes. Evidence refers to data that have been analyzed, interpreted, or used to support a claim, conclusion, or decision. Evidence goes beyond the raw numbers to show meaningful patterns, trends, or findings that can inform action.

This distinction is important, because we find data can be static; educators collect it but don’t take action. Evidence is about taking the data and actually using the information to make impactful moves.

Questions Please!
Educators tell us they do not always know what questions to ask when exploring data and evidence. We find Victoria Bernhardt’s work to be a great catalyst for conversations about data and evidence.

To quell some of the anxiety that comes with talking about data and foster a learner’s mindset to see strengths, gaps, and blind spots in our leadership or teaching, we offer seven areas of questions to help guide your practice.

Q1 - Perception Questions
What insights have we gained from our perception data (e.g., school culture, climate, values) that challenge our assumptions about how we “do business” as a school? How can we use these data to guide improvement?

Q2 - Processes Questions
Which school processes (instructional, organizational, administrative) have the greatest impact on student learning in your school? What data support this, and how could these processes be improved?

Q3 - Patterns to Guide Performance
What patterns do you see in your student learning data (e.g., assessments FOR, AS, and OF learning)? According to Bernhardt,

  • Assessment FOR learning – Assessment helps teachers gain insight into what students understand in order to plan and guide instruction and provides helpful feedback to students.
  • Assessment AS learning – Students develop an awareness of how they learn and use that awareness to adjust and advance their learning, taking increased responsibility for their learning.
  • Assessment OF learning – Assessment informs students, teachers, and parents, as well as the broader educational community.

How are these data informing your next steps in improving instructional strategies?

Q4 - Professional Development
What types of data (e.g., surveys, observations, student performance) are most helpful in identifying professional development needs for your staff? How can you align your leadership efforts to support these needs?

Q5 - Impactful Programs
How effectively are your school programs (e.g., Accelerated Reader, AVID, 9th Grade Transition) supporting student learning and growth? What data can you collect to evaluate their impact?

Q6 - Action Over Inertia
How do you ensure that data discussions during staff meetings inspire action rather than overwhelm?

Q7 - Reflective
If you knew then what you know now, how might you have taught that lesson/or facilitated that faculty meeting differently?

In the End
These seven areas of questioning can help teachers and leaders engage in deeper and ongoing conversations about using evidence from their data to improve their teaching and learning practices and ultimately better support student learning. Making this practice a staple of staff meetings and workshops creates a culture of fostering collective efficacy between the leader and teachers.

Interested in engaging in deeper conversations about data, evidence, and grading? Then click here to listen to an interview with Tom Guskey on our Leader’s Coaching Leaders podcast to further consolidate the information from this blog post.

The opinions expressed in Finding Common Ground With Peter DeWitt & Michael Nelson are strictly those of the author(s) and do not reflect the opinions or endorsement of Editorial Projects in Education, or any of its publications.

Events

Teaching Profession K-12 Essentials Forum Supporting the New K-12 Workforce: What Teachers Need to Stay at School
 Join this free virtual event to discover what teachers say they need to feel supported to stay in classrooms for the long haul.
College & Workforce Readiness K-12 Essentials Forum Career and Technical Education Takes Its Next Big Step
Join this free virtual event to hear creative approaches to modernize CTE programs and navigate the shift away from a near-exclusive focus on "college preparedness."

EdWeek Top School Jobs

Teacher Jobs
Search over ten thousand teaching jobs nationwide — elementary, middle, high school and more.
View Jobs
Principal Jobs
Find hundreds of jobs for principals, assistant principals, and other school leadership roles.
View Jobs
Administrator Jobs
Over a thousand district-level jobs: superintendents, directors, more.
View Jobs
Support Staff Jobs
Search thousands of jobs, from paraprofessionals to counselors and more.
View Jobs

Read Next

School & District Management How School Board Members Really Feel About Political Conflict
Political tensions remain high for many school boards across the country, new survey data show.
3 min read
Members of the school board sit on stage in the school auditorium to respond to questions from residents during the annual Town Meeting, on March 5, 2024, in Stowe, Vt. Town Meeting is a tradition that, in Vermont, dates back more than 250 years, to before the founding of the republic. But it is under threat. Many people feel they no longer have the time or ability to attend such meetings. Last year, residents of neighboring Morristown voted to switch to a secret ballot system, ending their town meeting tradition.
Members of the school board sit on stage in the school auditorium to respond to questions from residents during the annual Town Meeting, on March 5, 2024, in Stowe, Vt. A new survey suggests that political conflict that rose during the pandemic has remained relatively high for many school boards across the country.
Robert F. Bukaty/AP
School & District Management LAUSD Taps Interim Chief as Superintendent 3 Days After Carvalho's Resignation
Andres Chait has served as a teacher, principal, and regional superintendent in Los Angeles.
Howard Blume, Los Angeles Times
6 min read
Acting Superintendent Andres Chait at a Los Angeles Unified School District Board meeting in Los Angeles on June 23, 2026 .
Acting Superintendent Andres Chait at a Los Angeles Unified School District Board meeting in Los Angeles on June 23, 2026. LAUSD has named Chait its new superintendent on a permanent basis following Alberto Carvalho's resignation earlier this week.
Myung J. Chun/Los Angeles Times via TNS
School & District Management Lessons Learned About Bold Tech Initiatives From the LAUSD Chief's Departure
Bold initiatives can cut both ways, says a leadership expert, sparking achievement gains or falling apart.
20260622 AMX US NEWS WHAT ALBERTO CARVALHOS RESIGNATION MEANS 1 LD
Alberto Carvalho, then the Los Angeles Unified School District superintendent, listens to parents of students at a Los Angeles high school on March 30, 2022. Carvalho resigned from his position Sunday night under the cloud of a failed AI chatbot initiative and an FBI investigation.
Photo by David Crane, Los Angeles Daily News/SCNG
School & District Management Carvalho Resigns as L.A. Unified Superintendent Amid Federal Investigation
Alberto Carvalho has been under FBI investigation for four months after a failed AI chatbot venture.
Howard Blume, Los Angeles Times
6 min read
Los Angeles Schools Federal Raid 26059057494102
Alberto Carvalho speaks about Los Angeles students' improved scores before Gov. Gavin Newsom signed legislation related to student literacy in Los Angeles on Oct. 9, 2025. The Los Angeles Unified superintendent, facing an FBI investigation, resigned June 21.
Damian Dovarganes/AP Photo