The move is particularly aimed at identification, admission and continued education of migrant children who have been affected during the pandemic, they said.
The NAHT is calling on the Government to tell heads how many pupils on-site is "too many" as it says high pupil attendance could "seriously undermine" the impact of lockdown and risk longer closures.
Almost three in four (74%) school leaders say demand for places has "greatly increased" compared to the lockdown in March previous year, according to a survey shared with the PA news agency.
In a survey of almost 5,000 heads, nearly half (48 per cent) said they have had to prioritise places for children of key workers or vulnerable pupils in their school "due to an excess of demand".
According to guidance issued by the Education Authority as new remote learning measures came into force, there will be no specific provision of school meals for vulnerable children or children of key workers still attending schools.
The party's training spokesperson claimed she was concerned that the children of critical personnel who are continue to attending have not been receiving school meals.
"While the majority of children are not now at school because of the Covid-19 restrictions and parents of children entitled to free school meals are receiving a direct payment, children of some key workers are still attending school and concerns have been raised that some are not receiving hot meals", the Sinn Fein MLA said.
'We know that for parents it is tough having to juggle home schooling whilst working from home.
Exploring the option of classroom-on-wheels and classes in small groups at the village level, increasing the access of children to online and digital resources, use of TV and radio to reduce learning losses and ensuring easy and timely access to the provisions of uniforms, textbooks and mid-day meals are among the recommendations made by the ministry for student support during the closure of schools.
"It is critical that school places for the children of key workers are only used when absolutely necessary in order to reduce the numbers in school and stem the spread of the virus".
Using Mano Darpan web portal and tele-counseling number for counseling services and psycho-social support.
"I have spoken to the Education Authority on this challenge and reiterated the great importance of youngsters acquiring hot foods at college in a safe and sound and accountable way".
The survey, of 4,964 school leaders in England, comes amid reports of councils and schools seeking to prioritise places for parents who are both key workers, or who work in emergency life-saving services.
As the above steps are taken to prepare for school reopening, children's health experts must have a seat at the decision-making table as Ontario considers strategies to best ensure the safety and well-being of our kids.
Ensuring reading with comprehension and numeracy skills by encouraging children to read books beyond the syllabus and creative writing & problem-solving.
European Union transition workers have also been added to the list of parents who are eligible for school places.