9v9→11v11 Bridge Builds

Obj: The transition-year structure mapping — showing U12s (spring) and U13s (fall) exactly how their 3-2-3 build becomes the 4-3-3's, so the big field inherits fluency instead of fear. Field: Progressive: 9v9 half, then full-size half. Equip: Goals, cones, balls, bibs, tactics board. Org: Block 1 (board + walk, 5 min): the map made explicit — 9v9's back three splits INTO back four (wide CBs become fullbacks' spacing), pivots become the 6+8, the front three's width laws survive whole. Block 2 (10 min): the same build pattern run on BOTH fields back to back — D-03's Route 1 at 9v9 scale, then immediately at 11v11 scale with the two extra players slotted (the pattern's skeleton identical, the field's size absorbed by legs not new ideas). Block 3 (8 min): live vs. press on the big field, 9v9-vocabulary calls kept deliberately ("Route 1!" still works). CP: (1) Nothing you know is wrong — the field grew, the ideas didn't (the transition-year's central reassurance, 4.13's tuition-year framing); (2) bigger field = the free man is FURTHER away — scans must lift their range (the year's real adaptation); (3) the extra players are extra ANSWERS, not extra confusion — the +1 math got better. Prog: Press grows across blocks; U13s teach the map to U12s in shared sessions (mixed-age teaching, 7.6). Reg: Unopposed pattern-mirroring only; shrunk 11v11 field (intermediate size). Mist: P: U13s abandoning known patterns in the new geometry's panic (the identical-pattern blocks exist to prevent exactly this); C: teaching 11v11 build as new content (frame EVERYTHING as translation — the psychology is the session). Time: 23 min (spring U12 / fall U13 staple). Out: Transition-year confidence; pattern portability proven to the players' own eyes. Var: Reverse bridge for 9v9 players covering up (11v11 concepts pre-loaded gently). Diag: Side-by-side field maps: 3-2-3 build shape with arrows morphing into 4-3-3 shape, matching pattern arrows on both, equivalence lines connecting the roles.