The Global Brain Trust: How We Assess Learning

At Promontory, assessment is not a single test score. It is a record of growth.

We use a formative system called the Global Brain Trust, or GBT. Students earn visible GBT points through structured academic challenges that increase in rigor and independence.

Each task is organized into five levels:

Lhasa / Basecamp 1 / Basecamp 2 / Ascent / Summit

These levels represent increasing depth of thinking, precision, and independence. They are not arbitrary. They reflect the quality of reasoning demonstrated.

Lhasa work shows foundational understanding.Summit work reflects advanced reasoning, synthesis, and intellectual maturity.

Each level carries a defined point value. Students see, in real time, how their effort and performance translate into measurable academic progress. This transparency promotes ownership.

However, GBT points are only one part of the system.

Teachers maintain detailed narrative notes. These notes document patterns in reasoning, clarity of expression, intellectual risk-taking, collaboration, and persistence. Numbers alone cannot capture growth. Narrative feedback provides context and direction.

Students also participate in a structured Defense of Learning process. At key points during the year, they present and defend their work. They explain their thinking, justify their conclusions, and reflect on their development. This is not performance for spectacle. It is intellectual accountability.

Together, these elements create a balanced system:

Quantitative markers through GBT points. Qualitative insight through teacher narrative. Public reasoning through Defense of Learning.

Over time, accumulated GBT performance can be translated into traditional grading equivalents when required for transcripts or transitions. Families receive clear documentation. There is no ambiguity about academic standing.

But the culture is different from a conventional grading model.

We do not reward minimal compliance. We do not inflate scores for effort alone. We expect students to attempt their best work the first time, and we support them in reaching that standard.

Assessment at Promontory is not about sorting students. It is about strengthening judgment, responsibility, and clarity of thought.

The goal is not a number.

The goal is growth that can be seen, explained, and defended.