Question: What is the most important element of step dance, a style performed by Ira Bernstein?

Context paragraphs:
Álfablót: The Álfablót or the Elven sacrifice was a pagan Scandinavian sacrifice to the elves towards the end of autumn, when the crops had been harvested and the animals were most fat.  Unlike the great blóts at Uppsala and Mære, the álfablót was a local celebration at the homesteads and they were mainly administered by the lady of the household.  Nothing is known about the particular rites because they were surrounded by secrecy and strangers were not welcome to the homesteads during the celebrations.  However, since the elves were collective powers with a close connection to ancestors and fertility, it is possible that the álfablót concerned ancestor worship and the life force of the family.  It also appears that Odin was implied and that the master of the household was called "Ölvir" when administering the rites.  The first element of "Ölvir" means "beer", which was an important element in Norse pagan sacrifices generally.

Jig doll: Jig dolls are traditional wooden or tin-plate 'toys' for adults or children.  They are dolls with loose limbs that step dance or 'jig' on the end of a vibrating board or platform in imitation of a real step dancer.  In London they were frequently operated by street entertainers or buskers.  In England old soldiers from the Great War sometimes busked with them to supplement their meagre war pensions.  Typically the dolls are between 20–30 cm tall and are jointed at arms, hips and knees; some also have ankle joints.  Today, jig dolls of one kind or another can be seen in the USA, Canada, the UK, Ireland, Europe, parts of Asia, and Australia.

Punta: Punta is a Garifuna music and dance style performed at celebrations and festive occasions.  (Garifuna music and dance was created by the Garifuna people of present-day St. Vincent and Dominica.)

Step dance: Step dance is the generic term for dance styles in which the footwork is the most important part of the dance.  Limb movements and styling are either restricted or considered irrelevant.

Calcutta School of Music: Calcutta School of Music established in 1915 by Phillipe Sandre is one of the premier institutions of India, in the field of Western Classical music and Contemporary classical music.  It was established in the year 1915 by Phillipé Sandré, a musician of considerable calibre, and a contemporary and friend of the famous composer Saint Saëns.  It has a wide ranging canvas of musical disciplines covering both Indian and Western music, dance, speech training, elocution, and drama.  The School is an important element of the city of Kolkata, providing liberal instruction in musical subjects on one hand, and also arranging orchestral, chamber and solo music training and concerts, as well as music appreciation sessions throughout the year.  Many visiting luminaries of the musical world have visited the School throughout its existence.  this include maestros Yehudi Menuhin, Isaac Stern and Mstislav Rostropovich.  The great sitar maestro Pandit Ravi Shankar inaugurated the faculty of Indian Music & Dance during the year 1975.

Dancer's Delight: Dancer's Delight is a Scottish soft-shoe step dance devised in 1964 to commemorate the first anniversary of the United States Highland Dancers' Association.  The dance is performed to 2/4 marches, e.g., Scotland the Brave.  Dance instructions were published by Ron Wallace in 1994.  Unlike softer Scottish ladies' step dances, e.g., The Thistle, Dancer's Delight resembles a Scottish highland dance in terms of style and technique.

The Next Step (2013 TV series): The Next Step is a Canadian teen drama series created by Frank van Keeken, and produced by Temple Street Productions.  Shot in a dramatic mockumentary style, the series focuses on a group of dancers who attend The Next Step Dance Studio.  The studio had former regional, national and international titles but lost them all when their rival, Gemini Dance Studio won these prestigious dance competitions.

Splat (furniture): A splat is the vertical central element of a chair back.  Typically this element of a chair is of exposed wood design.  The splat is an important element of furniture identification, since its design has a multitude of variations incorporating the themes of different furniture periods.  Chippendale's furniture was designed using varied splat details to include Gothic, Chinese, English and some with French details.

Ira Bernstein: Ira Bernstein (b. Malverne, New York, 1959) is a dancer and teacher in the United States who specializes in traditional American dance forms such as Appalachian-style clogging, flatfoot dancing, tap dance, and step dancing.  He is considered an authority on clogging, and the leading figure in this dance style.  He calls himself a "percussive step dancer who specializes in Appalachian flatfooting," and also dances Green Grass style Appalachian clogging, English clogging, French-Canadian step dancing, Irish step dancing, and South African gumboot dancing.

List of The Next Step episodes: "The Next Step" is a Canadian teen drama series created by Frank van Keeken and produced by Temple Street Productions.  Shot in a dramatic mockumentary style, the series focuses on a group of dancers who attend The Next Step Dance Studio.  They have won Regionals, Nationals and Internationals.  s of 11, 2017, episodes of "The Next Step " have aired, concluding the first half of the  season.

Supporting paragraphs: Ira Bernstein Step dance
Answer: the footwork