[SITE]
Domain: bukittimahtutor.com
Place:  SGP.SG.BT
Lane:   EDU.MATH.PSLE
Role:   Repair Router (Truncation + Stitching)
Zoom:   Z0–Z3
v:      v1.0

[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z3×V×LOCK×BTT.PSLE.PURPOSE×v1.0:
  txt: "PSLE Math tests representation (modeling), error discipline, and transfer under time. BTT repairs meaning-first math, not drill-first math."
[EDGE]
binds_to:
  SGP.SG.BT×EDU.MATH×Z3×R×PROTOCOL×BTT.MATH.REPAIR×v1.0
  SGP.SG.BT×EDU×Z3×R×PROTOCOL×BTT.REPAIR_ROUTING×v1.0

[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z0×L×PRIM×PSLE.NUMBER_SENSE×v1.0:
  def: "quantities feel real; estimation; place value; operations meaning"
[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z0×L×PRIM×PSLE.UNIT_DISCIPLINE×v1.0:
  def: "labels/units tracked correctly; prevents nonsense answers"
[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z1×L×PRIM×PSLE.REPRESENTATION_MODELING×v1.0:
  def: "turn words into structure (bar models / diagrams / equations)"
[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z1×L×PRIM×PSLE.ERROR_LOOP×v1.0:
  def: "detect and localise mistakes; check methods"
[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z2×L×PRIM×PSLE.TRANSFER_VARIATION×v1.0:
  def: "handle non-routine and multi-step variations"
[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z2×L×PRIM×PSLE.TIME_COMPRESSION×v1.0:
  def: "execute within time without panic; stable accuracy"

[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z3×S×PHASE×P0P3.PSLE×v1.0:
  P3:
    - "models correctly; solves non-routine; checks units; stable under time"
  P2:
    - "strong in routine types; brittle under unfamiliar phrasing; occasional careless errors"
  P1:
    - "drill-dependent; slow; collapses on multi-step; forgets checks"
  P0:
    - "cannot start; avoidance; shutdown"

[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z3×R×TRACE×BTT.PSLE.FAILURE_MODE×v1.0:
  chain:
    - "Z0: weak number sense → wrong operation choices"
    - "Z1: representation fails → cannot structure word problems"
    - "Z1: error loop weak → careless errors repeat"
    - "Z2: transfer breaks → non-routine questions fail"
    - "Z2: time compression collapse → panic → accuracy drops"
  phase_drift:
    - "P2 routine illusion → P1 under variation/time → P0 under exam stress"
  repair_route:
    - "truncate speed → rebuild modeling → restore error loop → add variation ladder → add time last"

[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z0×R×TRACE×BTT.PSLE.CLUSTER.CARELESS×v1.0:
  symptoms:
    - "wrong units"
    - "copied numbers wrongly"
    - "missed keywords"
    - "off-by-one steps"
  root:
    - "weak input precision + weak error localisation"
  fix:
    - "precision rituals + check scripts + repeat-error elimination"

[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z1×R×TRACE×BTT.PSLE.CLUSTER.METHOD_CHOICE×v1.0:
  symptoms:
    - "uses wrong operation"
    - "guesses formula"
  root:
    - "number sense + representation missing"
  fix:
    - "meaning-first operation selection + diagram requirement"

[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z2×R×TRACE×BTT.PSLE.CLUSTER.NONROUTINE×v1.0:
  symptoms:
    - "fails new phrasing"
    - "stuck when steps not obvious"
  root:
    - "variation ladder missing"
  fix:
    - "principle extraction + controlled variations"

[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z2×R×TRACE×BTT.PSLE.CLUSTER.TIME_COLLAPSE×v1.0:
  symptoms:
    - "slow"
    - "rushes at end"
    - "panic blanks"
  root:
    - "time control missing; acceleration mismatch"
  fix:
    - "time budgeting + staged speed training"

[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z3×S×MODULE×PRI12.CAPABILITY_LADDER×v1.0:
  focus:
    - PSLE.NUMBER_SENSE
    - PSLE.UNIT_DISCIPLINE
  risk_if_missing:
    - "later modeling becomes guessing"

[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z3×S×MODULE×PRI34.CAPABILITY_LADDER×v1.0:
  focus:
    - PSLE.REPRESENTATION_MODELING
    - PSLE.ERROR_LOOP
  risk_if_missing:
    - "careless becomes chronic; word problems become fear"

[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z3×S×MODULE×PRI56.CAPABILITY_LADDER×v1.0:
  focus:
    - PSLE.TRANSFER_VARIATION
    - PSLE.TIME_COMPRESSION
  risk_if_missing:
    - "routine strong, exam collapses on non-routine/time"

[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z3×R×PROTOCOL×BTT.PSLE.REPAIR×v1.0:
  TRUNCATE:
    - "stop speed-chasing drills"
    - "remove time pressure temporarily"
    - "restore confidence via correct modeling"
  REBUILD_1 NUMBER + UNITS:
    - "operation meaning"
    - "estimation"
    - "unit discipline"
  REBUILD_2 REPRESENTATION:
    - "bar models / diagrams"
    - "known-unknown-relationship template"
    - "equation after model, not before"
  REBUILD_3 ERROR LOOP:
    - "check scripts"
    - "repeat-error elimination"
    - "self-correction habit"
  REBUILD_4 TRANSFER:
    - "variation ladder"
    - "principle extraction"
    - "non-routine training"
  TIME (ONLY AFTER STABLE):
    - "time budgeting"
    - "accuracy under mild time"
    - "speed last"

[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z0×R×METRIC×BTT.PSLE.SENSOR.UNIT_ERROR_RATE×v1.0:
  def: "unit/label mistakes frequency"
[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z1×R×METRIC×BTT.PSLE.SENSOR.MODEL_QUALITY×v1.0:
  def: "quality of representation (diagram captures relationships)"
[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z1×R×METRIC×BTT.PSLE.SENSOR.REPEAT_ERROR×v1.0:
  def: "repeat error recurrence per set"
[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z2×R×METRIC×BTT.PSLE.SENSOR.NONROUTINE_BREAK×v1.0:
  def: "failure probability on unfamiliar PSLE-style questions"
[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z2×R×METRIC×BTT.PSLE.SENSOR.TIME_END_COLLAPSE×v1.0:
  def: "drop in accuracy in last third of paper"

[NODE]
SGP.SG.BT×EDU.MATH.PSLE×Z3×V×LOCK×BTT.PSLE.ASTAR_MEANING×v1.0:
  txt: "PSLE A* / top performance means P3: strong modeling + strong transfer + low repeat-error + stable time control."

[LOCKBLOCK:BTT.PSLE_MATH.v1.0]
PSLE Math is representation + transfer + time-compression.
BTT repairs: truncate speed-chasing → number+units → modeling → error loop → variation ladder → time → speed last.
Target: P3 (non-routine stable under time), not P1 drill illusion.