Most educational systems — and most ed-tech platforms — build a static profile of a student at the start and then treat it as fixed. A placement test puts them in Level 3. They stay in Level 3 until someone manually moves them. The profile doesn't change because nobody is tracking what actually changes — the student's understanding, session by session, concept by concept.
The Lacefield system builds a profile that updates after every session based on what the student actually demonstrated. Not what they were predicted to know. What they showed they understood, where they got stuck, what specifically they got wrong, and why.
By session five the system knows more about how this student learns than most teachers discover in a semester. Not because it's smarter — because it's tracking the right things and never stopping.
The system maintains two separate records for every student. The first tracks where they are conceptually — their actual understanding level on each concept branch, the specific wrong beliefs that are producing errors, the basic operations that are slowing them down. This record drives what gets taught and at what difficulty.
The second tracks who they are — their career, their goals, their hobbies, what real-world context will make abstract concepts click. This record drives how problems are framed. A construction worker gets problems about measurements. A nurse gets problems about dosage ratios. The math is identical. The framing is personal.
These two records are never combined. Knowing someone works in construction tells you nothing reliable about their schema floor on fractions. Mixing them produces instruction that is simultaneously less diagnostic and less personal than if they had been kept separate.
Every session, the tutor logs what happened — which concepts were covered, what the accuracy was, whether any new misconceptions surfaced, whether the difficulty needs to go up or down. That information goes into the profile immediately. The next session starts from a more accurate picture of where the student actually is.
Over time the profile becomes precise in a way no static assessment can match. A one-time placement test captures where a student was on one day under one set of conditions. The dynamic profile captures the pattern across sessions — which concepts are solidifying, which ones keep producing the same errors, where the real floor is underneath the apparent performance level.