Opening learning paths…
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Course footage preview Six connected projects
Public lessons and worked examples
Choose your learning track
Learn shared foundations, then work with real industry materials.
Tennis track
From serve judgments to rally relationships and package quality checks.
Start with preparation and tosses. Deliver contact windows, local rallies and child stroke records, handle withdrawn actions and unknown outcomes, and recalculate corrections by rule version. Use a new recording source for independent first submissions and revisions of serves, rallies and toss–catch sequences.
Courses follow your selected language. Revisit the shared foundations as needed; each project below includes real material, practical tasks and a review.
From evidence-based judgment to a complete deliverable
The first five projects build skills; the last combines them on an independent source. Follow the sequence or revisit a project to revise.
- P1Open project
Preparation, tosses and visible evidence
Establish two kinds of serve evidence without counting preparation as a stroke.
- P2Open project
Contact intervals and evidence levels
Provide a verifiable contact window, retaining uncertainty caused by the actual resolution and off-screen ball paths.
- P3Open project
Rallies, strokes and observation scope
Deliver a traceable parent–child structure distinguishing the selected player's strokes, opponent events and unobservable spans.
- P4Open project
Repeated tosses, withdrawn actions and unknown outcomes
Confirm a visible release–catch without a hit–release sequence. Reject posture-only judgments and document unknown outcomes and required evidence.
- P5Open project
Quality checks, deduplication and rework after rule changes
Correct events and parent–child scopes, remove duplicates and off-screen guesses, fill observation gaps and recalculate a verifiable deliverable under the rules.
- P6Open project
Independent delivery and targeted revisions on a new source
Combine stages, time windows, hierarchy, exceptions and r2 quality checks on a recording source not used in instruction; retain first and revised submissions.
Advanced practice
Advanced tennis: actions, contacts and continuous events
Start with visible evidence of swings, contact and bounces. Handle object continuity, unclear boundaries and duplicates, then complete rework and deliveries from two new sources.
Start advanced practice
Course completion and independent delivery quality are verified separately. Keep work pending review when human references are not ready.
- T1Open advanced practice
See the evidence before naming the event
Record a racket swing separately from racket–ball contact; do not infer contact from posture.
- T2Open advanced practice
From falling to rising: locate bounce evidence
Use a continuous trajectory and its change of direction to identify a bounce while retaining uncertainty about the contact instant.
- T3Open advanced practice
Link an action to its contact record
Link the action and contact to the same object and evidence while distinguishing a sustained process from a brief event.
- T4Open advanced practice
Inspect continuously and deliver an event table without omissions or duplicates
Maintain objects and events throughout a continuous input, avoiding double counts and selection of only obvious moments.
- T5Open advanced practice
Revise an existing draft with errors
Find positional offsets, duplicates and excessive certainty, and deliver a traceable new version.
- T6Open advanced practice
Deliver independently from two new sources
Complete inspection, delivery and self-review without a demonstration or reference answer for this clip.
A practical learning sequence
- Study the example
Start with illustrated explanations, a complete demonstration and boundaries that are easy to misjudge.
- Work independently
Gradually remove hints while building linked records, correcting quality issues and reworking rule changes.
- Deliver on another source
Deliver a complete package from an independent source, retain the first submission, then make targeted revisions.