This is a story that benefits from being seen more than once.
There are 249 spellers, but some will have no trouble with this as the eight main spellers followed are introduced in the first half of the documentary.
Others will have problems as they wear a uniform during the stage presentations, Ashley changes her hair style and avoids glasses for the contest, Angela wears glasses for the contest and often looks a bit like Emily who often looks a bit like April.
They all wear small name badges and large number signs, but these are often off camera.
Some background detail relates to appearances at the 71st and 73rd events, different age and grade and number, etc.
Skin colour, hair, tooth braces, maybe earrings. These are useful helps.
Full names are in the IMDb cast and crew list. More details will be available on the net for the 72nd annual Scripps Howard national spelling bee.
Angela, number 85, age 14 grade 8, braces, long brown hair, glasses during the contest
Nupur, number 165, Asian Indian female, shoulder length hair, glasses
Emily, number 148, age 14 grade 8, long darkish hair, glasses
Ashley, number 149, age 13, chocolate coloured, variable hair, variable glasses
April, number 61, shoulder length darkish hair, glasses, has a loyal pet dog
Ted, number 243, white tall athletic, short dark hair
Neil, number 139, age 12 grade 8, Asian Indian male, tall slim, short dark hair
Harry, number 8, age 12 grade 6, braces, short dark hair
Also George, Asian Indian male, age 11 grade 6, short dark hair, glasses, out in round 10 just after April but won the year after. Two Asian Indians got through to the final four and their understandings re academia are said to relate to that, cultural beliefs.
Those whose colour is not mentioned should be assumed to be peach.