A Long Island company that employs more than 300 active and former teachers to score standardized test essays is giving high grades to the business line that has roughly doubled its revenue since 2012.

OSC World president Michael H. Kerr said the period from early April, following the grade 3-8 English Language Arts test in New York, through this week’s state Math Assessment and until the June Regents tests, is like the holiday selling period for shop owners. Total headcount balloons to about 400, including the scorers, 30 full-timers, drivers and technical-support staff.

“This is Christmastime in retail,” Kerr said.

Active and retired teachers using laptops at OSC scoring centers in Hicksville, Central Islip and upstate Clifton Park are delivered “anonymized” digital images of hand-written essays. Rather than deal with multiple questions, the teachers repeatedly grade answers to a single question. They use rubrics to determine how many points each student’s essay should be awarded. OSC doesn’t handle the “bubble” scoring of multiple-choice questions.

Until 2010, the Lynbrook company exclusively worked to process, scan and deliver raw data from market research surveys for clients including Gallup Inc. and Experian plc. That raw data, converted into digital form, fuels business decisions.

That year, the company rolled out software services to the Boards of Cooperative Educational Services for Nassau and Eastern Suffolk to streamline the grading of standardized tests. Under the initial version of the service, teachers would come to BOCES centers to score tests using OSC’s software.

advertisement | advertise on newsday

Since then, the test-scoring business has grown rapidly and the service has evolved to what Michel Richez, OSC’s executive vice president of business development, calls “full-service scoring.” That system, in which the company hires active and retired teachers to do the scoring on laptop computers in OSC’s centers, accounts for the vast majority of OSC’s test-scoring business.

By 2013, OSC World was processing about 150,000 ELA and mathematics exams and overall revenue was about $1.5 million.

This year, test scoring — 300,000 grade 3-8 ELA and math exams and 35,000 fourth- and eighth-grade science exams — will account for about half of the company’s projected $3.7 million in revenue. “We’re doing over 350 school districts and private schools statewide now,” said Richez, including test scoring for 25 of 56 public school districts in Nassau and 55 of 69 in Suffolk.

“We’ve grown quickly in that business,” Kerr said.

That growth has come despite being paid by the number of tests and operating on Long Island — an epicenter of the national opt-out movement in which parents have their children be excused from taking standardized Common Core tests.

More than 97,000 public school students — 51.2 percent of those eligible — in 116 Long Island districts refused to take the state ELA exam this spring, according to a Newsday survey.

Nassau and Eastern Suffolk BOCES and their Regional Information Centers, which provide technology services to the area’s public, private and parochial schools, are major customers of OSC World. OSC’s biggest customer is the Lower Hudson Regional Information Center, a nonprofit consortium providing educational and administrative technology services to 62 school districts in Westchester, Putnam, and Rockland counties.

That region also is an opt-out hotbed.

Other customers include upstate clients Central New York Regional Information Center, Mohawk Regional Information Center and Broome-Tioga BOCES.

Danielle Hudek, Eastern Suffolk BOCES’ administrative coordinator for curriculum and assessment, said that even the pilot rollout of OSC’s system — before the advent of full-service scoring — showed that it was far more efficient than having teachers move around boxes of tests, open each booklet and find a particular question.

advertisement | advertise on newsday

“What we discovered as a result of the pilot was that scoring required half the amount of time or half the amount of teachers” using the OSC system, she said.

In the spartan offices of OSC World, the company’s 30 full-time employees oversee part-time workers who use machines to cut off the spines of test booklets, vacuum pages to sweep up erasure debris and prevent jamming and scan those pages.

But perhaps the biggest trick is logistics: tracking each test booklet via a bar code and ensuring that the pages and attendant data are processed correctly.

“We don’t want to put a student’s paper in jeopardy,” said Kerr, who co-owns the business with his sister, vice president Carol Harrison, and cousin, executive vice president Jeffrey Schneider, who wrote the code for the scanning software.

New technology, however, is altering the test-taking process and lessening reliance on paper.

advertisement | advertise on newsday

In 2015, New York’s State Education Department awarded Minneapolis-based Questar Assessment Inc. a five-year, $44 million contract to develop computerized versions of the standardized tests for grades 3-8 ELA and mathematics.

Kerr said that OSC has been certified for scoring Questar’s computerized tests to keep abreast of a changing industry.