Danielson vs Marzano vs CLASS: Which Framework Fits Your School?

Danielson, Marzano and CLASS answer different questions. Danielson asks whether teaching practice meets a professional standard. Marzano's Focused model asks which instructional strategies a teacher uses. CLASS asks how good the interactions are. Choose based on which question your district actually needs answered.

The three get compared as if they were interchangeable products. They are not. They were built for different purposes by different organisations, and the practical differences show up in how long an observation takes, what observers need training on, and what you can defend in an evaluation conference.

What is the Danielson Framework for Teaching?

The Framework for Teaching is a professional practice framework organised into four domains covering 22 components: Planning and Preparation, Learning Environments, Instruction, and Professional Responsibilities. It was most recently revised in 2022 and is published by the Danielson Group.

Two of the four domains — Planning and Preparation, and Professional Responsibilities — describe work that happens outside the lesson. That is the defining characteristic. A Danielson observation is not only about what an observer sees in the room; it draws on planning documents, reflection conversations, and evidence of family communication and professional contribution.

That breadth is why it dominates formal evaluation. It is also why it is heavy: covering all 22 components meaningfully takes more than a classroom visit, and districts that try to score every component on every walkthrough end up with thin evidence and frustrated observers.

What is the Marzano Focused Teacher Evaluation Model?

The Focused Teacher Evaluation Model is a deliberately shortened model of 23 essential elements across four areas of expertise. It was created by Robert J. Marzano with Learning Sciences International, and the Focused version exists specifically to reduce the size of earlier Marzano models.

The word doing the work is "focused." Earlier Marzano models were considerably larger, and the Focused model was a response to districts finding them impractical to run at scale. If someone tells you they use "the Marzano model," ask which one — the difference in observer workload is substantial.

Marzano is strategy-oriented rather than standard-oriented. Elements describe things a teacher does. That makes it comfortable for coaching conversations, because feedback lands on a specific, changeable behaviour rather than on a judgment about overall practice.

What is CLASS and how is it different?

The Classroom Assessment Scoring System measures the quality of teacher-student interactions rather than teacher practice. It was developed at the University of Virginia and is managed by Teachstone. The core version scores three domains — Emotional Support, Classroom Organization, and Instructional Support — with a fourth, Student Engagement, added in the upper elementary and secondary tools.

CLASS also differs procedurally in a way that surprises districts. Observation runs in timed cycles: roughly 15–20 minutes of observation followed by about 10 minutes of scoring outside the classroom, repeated four times. That is a materially different logistical commitment from a single lesson visit, and it is why CLASS is rarely used for routine walkthroughs.

Because it scores interactions rather than practice, CLASS says little about planning, assessment design, or professional responsibilities. It is strongest in early learning, where interaction quality is the thing most worth measuring, and weakest as a standalone evaluation instrument for secondary content teaching.

How do the three compare side by side?

Danielson is the broadest and the heaviest. Marzano Focused is the shortest list and the most coaching-friendly. CLASS is the most procedurally demanding and the most specialised.

Which framework should your district choose?

Start from the decision the observation has to support. If it feeds a formal evaluation with due-process implications, choose Danielson. If it feeds coaching cycles, choose Marzano Focused. If it feeds early-learning quality improvement, choose CLASS.

Does your observation software need to match the framework?

It needs to reproduce your rubric's language and scoring model without forcing a translation. It does not need to carry the framework's brand name.

This is worth being precise about, because vendors often are not. Frameworks are published intellectual property. Most observation tools — including Voxento's — ship structurally similar templates using generic language rather than licensed framework text. That is normally fine: what matters is whether observers can score the criteria your district actually adopted.

So the question to ask a vendor is not "do you support Danielson?" It is "can I reproduce my exact rubric, with my domain names and my scoring levels, without rewriting it?" Voxento's observation templates cover formal observation, coaching observation, interaction observation, and short walkthroughs, and are built to be adapted to a district's own structure.

If you are still narrowing down tools rather than frameworks, the companion piece on how to choose teacher observation software walks through the evaluation criteria in order.