dcf.cymru stimulus sheet · PE · Year 11

Cerys’s slalom race: the video evidence dossier

Cerys, her school, her club, the race and every file on this sheet are invented. The slalom rules are real. This is practice only: it is not anyone’s NEA evidence.

1. The situation

Cerys Morgan is in Year 11. For GCSE Physical Education and Health Unit 2 she is being assessed in kayaking, which WJEC says must take place outdoors. Her school cannot watch her live on moderation day, and the specification says:

“Appropriate audio-visual evidence must be available for the performance of any candidate that cannot be seen ‘live’ on moderation day.” (WJEC GCSE Physical Education and Health specification, section 3.2)

It also says performance “must be assessed in a full and competitive context”. So her PE teacher, Mr Evans, needs video of real race runs. Her club coach filmed a regional slalom on a river course in north Wales on Saturday 12 September 2026. Mr Evans now has six video files and some notes, and has to decide what goes in her evidence folder and how.

2. The race

Canoe slalom: paddlers race down a white-water course through gates made of two hanging poles. Green gates are passed going downstream. Red gates must be passed going upstream, so the paddler has to turn round in the current. Touching a pole adds 2 seconds. Missing a gate adds 50 seconds.
This course: 18 gates, 6 of them red. Each paddler gets two runs and the better total counts.
Conditions: light rain. A gusty wind from the west kept swinging the poles at gates 6 to 8. The water was about 10 cm higher than on the practice day, so the current was faster, especially at red gate 7. At gate 14 there is a stopper (a wave that folds back on itself and can hold a kayak). The fast line runs close to it; the safe line goes wide.
Cerys’s results: Run 1: 101.2 seconds, 1 touch (gate 7), total 103.2. Run 2: 97.8 seconds, clean, total 97.8.

Key words: bow (front of the kayak), stern (back), stroke rate (paddle strokes in a set time), line (the route a paddler takes between gates).

3. The clip log

Clip	File and who filmed it	Format	What it shows (times are minutes:seconds into the clip)
C01	CLB_0412.MOV Club phone (coach)	4K, 60 frames per second, HEVC 1 min 52 s	Warm-up on the flat water above the start. Forward strokes and practice turns. No gates, no timing.
C02	CLB_0413.MOV Club phone (coach)	4K, 60 fps, HEVC 1 min 41 s	Run 1, the whole run, from the left bank, following her. 0:00 Start. Strong, quick first strokes. 0:18 Gates 1 to 4 clean, tight lines. 0:31 A gust swings the poles at gate 6. Cerys stops paddling for about a second to wait for the pole, and loses speed. 0:37 Red gate 7: she starts the turn late and leans back. Her stern touches the inside pole. Judge signals 2 seconds. 0:52 Gates 9 to 12 clean. Good control of the kayak in the fastest water. 1:10 Gate 14: takes the wide, safe line away from the stopper. Three extra strokes. 1:21 to 1:41 Final section. Coach’s count: 9 strokes from 1:21 to 1:31, then 7 strokes from 1:31 to 1:41. Her head drops. Finish: 101.2 seconds.
C03	CLB_0414.MOV Club phone (coach)	4K, 60 fps, HEVC 38 s	Run 2, part only. Recording starts late, at gate 12. From 0:12 to 0:20 spectators walk in front of the camera.
C04	IMG_2291.MP4 Cerys’s father’s phone	1080p, 30 fps, H.264 1 min 48 s	Run 2, the whole run, from the footbridge. Steady picture. 0:00 to 0:04 Two other junior paddlers from another club are clearly visible at the start, with their names on their bibs. Cerys’s father says her full name and the name of her school. 0:05 Start. 0:29 Gate 6: the same gusts, but she keeps paddling and sets up for gate 7 early. 0:35 Red gate 7: early turn, body upright, clean. 1:07 Gate 14: wide, safe line again. Three extra strokes. 1:22 to 1:42 Final section. Coach’s count: 10 strokes, then 9. Finish: 97.8 seconds. 1:42 to 1:48 Cerys celebrating.
C05	club_highlight.mp4 Downloaded by a classmate from the club’s public social media page	720p, 30 fps 25 s	An edited highlight mixing Run 1 and Run 2: slow motion, a pop song, the club logo in the corner.
C06	CLB_0418.MOV Club phone (coach)	4K, 60 fps, HEVC 32 s	Run 2, gates 5 to 9 only, zoomed in from the bank. You can see the paddle blade clearly through the turn at gate 7. From entering gate 7 to leaving it takes 1.5 seconds.

Also sent by the coach: Cerys-run-notes.pages, two pages of her notes on both runs, saved in Apple Pages.

4. The PE department’s evidence checklist (the school’s own rules)

Each clip must show a whole competitive run. The run itself must be unedited: no cuts, speed changes or music during the run. Trimming before the start or after the finish is fine.
The performer must be clearly visible for the whole run.
Every file must open on the department’s laptops. These laptops cannot play HEVC video: they play the sound with a black picture. They play H.264 MP4 files. They cannot open .pages files. They open PDF and Word (.docx) files.
Maximum 500 MB per file. Maximum 1 GB (1,000 MB) per pupil’s folder.
File names: candidate number_surname_activity_what it is. Cerys’s candidate number is 4127. Example: 4127_Morgan_Kayaking_Run1.mp4
Evidence is stored only in the school’s PE evidence folder. Access is view-only, for the teacher who assessed the pupil, the Head of PE and the moderator. Never on personal phones or in group chats.

5. How big is a video? (from the club phone’s camera settings)

Approximate size of one minute of video. HEVC files are smaller because HEVC compresses the picture more, but fewer devices can play them. H.264 files are larger but play almost everywhere.

Setting	HEVC (MB per minute)	H.264 (MB per minute)
1080p, 30 fps	60	130
1080p, 60 fps	90	200
4K, 30 fps	170	350
4K, 60 fps	400	440

fps = frames per second, the number of still pictures recorded each second. More frames means smoother slow motion when a coach analyses a movement.

6. A message from the club

From: Club secretary
To: Mr Evans

Great runs from Cerys on Saturday! Could you send us the Run 2 video from the evidence folder? We’d like to post it on the club’s public page and tag the school. We’ll add some music to liven it up. Thanks!