Most schools that have been at the center of structural concerns in recent weeks are expected to open or partially reopen after the midterm break on Monday.
Only two schools – Tyrrelstown National School Educate Together and St. Luke's National School – that share a campus – do not open.
Another 40 schools, where there were structural concerns, should be opened after security checks.
A total of 22 schools had fences and protective decks around school buildings as a precautionary measure.
Three of the schools will open at the ground level only after the implementation of internal engineering solutions and external precautionary measures.
In all, five teams involving more than 250 workers worked over the weekend to facilitate the reopening of schools.
The fact that so many schools are ready to reopen in any way represents significant progress on the part of the Department of Education in dealing with a controversy that arose just a fortnight ago.
The department said work should be completed in schools by 10:00 p.m. on Sunday.
The Tyrrelstown Educate Together national school and St. Luke's national school have decided not to open on Monday to fully explain the measures that are in place in schools, such as logistics to accommodate children in other places and traffic management plans developed by gardaí .
Authorities should also be at both schools, along with Gaelscoil Eiscir Riada, to respond to the concerns of officials or parents on Monday.
Only one school at Ardgillan Community College will remain fully enclosed, although the school says it will be able to accommodate all affected children.
A department spokesman said the weekend operation was a "great logistical exercise".
"The efforts and dedication of those involved should be recognized, as should the community spirit that was evident in various parts of the country, when schools needed support and contractors sought supplies on the weekend," a spokesman said. .
He added that school principals were being kept fully informed of progress and would receive written confirmation while the works were completed.
Individual school level agreements are being communicated by school officials directly to parents.
The 19 schools in need of interim protective measures are Scoil Chaitlin Maude in Tallaght, Dublin; Castlemills Education Center in Balbriggan, Dublin; Lucan East Educate Together NS; National School of São Paulo at Ratoath, Co Meath; Scoil Phádraig Naofa in Athy, Co Kildare; Athy Model School, Co Kildare; Gaelscoil Átha Í in Co Kildare; NS Convent in Portarlington, Co Laois; Gaelscoil Phortlaoise, Co Laois; and Scoil Phádraig Naofa, Rochestown, Co Cork.
Also in this category are Portlaoise Educate Together NS, Co Laois; Coláiste De Lacy, Ashbourne, Co Meath; Gaelscoil in Me, Ashbourne, Co Meath; Ashbourne Educate Together NS, Co Meath; Griffeen Valley Educate Together NS in Dublin; Gaelscoil Mhichil Uí Coileáin, Clonakilty, Co Cork; Junior High School (Special), Co Cork; Carrigaline Educate Together NW, Cork Co; Boys St Colman NS, Macroom, Co Cork.
School safety reviews were commissioned after problems were discovered at Ardgillan Community College in Balbriggan more than a week ago.
All schools were built by Northern Ireland's construction company, Western Building Systems.
The department insisted that the contractor and his design team were "fully responsible for the construction and certification of buildings" according to the regulations of the time. He said that the role of department representatives during periodic site visits was as "customer liaison." Education Minister Joe McHugh also pledged to recover all the money needed for the developer's repair work.
The developer insists, however, that it has a build history to the highest building standards.