With more than half the state’s 36 school districts scheduled to start classes this week, 8 districts still do not have new teacher contracts in place — although so far, no teachers’ union has threatened to strike and schools are expected to open on schedule.

Last week, 17 districts opened their schools as planned.

Four school districts with unsigned teacher contracts hashed out tentative agreements over the Labor Day weekend: Little Compton, Newport, Smithfield and Scituate.

School and union officials in Little Compton and Newport said they had not yet scheduled a vote to ratify the tentative agreements. Officials in Smithfield said the School Committee would vote tomorrow night.

Yesterday, officials in Scituate came to a tentative agreement, according to School Committee member Ernest Marcure, after a full day of negotiations. Marcure declined to offer any details of the agreement, and said the School Committee, which meets today, will review the agreement and, once it is ratified by the teachers’ union, will approve the document.

“We worked very well together to make this work and it won’t interrupt our school year or the children’s education,” he said. School starts today.

Among districts with unresolved teacher contracts:

•In Burrillville and Tiverton — two districts that are in their second year without signed teacher contracts — school officials and union representatives met in mid- and late August. It is unclear whether both sides have met within the past few days, as they have declined to comment on negotiations. Tiverton teachers are under a long-standing Superior Court order that requires them to be in the classroom, and the union has asked that new talks not be held until after the November elections.

Burrillville’s schools opened last Wednesday; Tiverton schools open today.

•The Bristol Warren district, where schools opened last Wednesday, has scheduled another round of talks for tomorrow, and Johnston, which also started classes last week, will hold more negotiations on Friday.

•Cranston and Providence, two of the largest districts in the state and the first to open(last Tuesday), have had recent negotiations but have not come to an agreement, according to school officials.

•Schools in East Providence are scheduled to open tomorrow. Roberta Brady, outgoing president of the teachers’ union, said the union has suggested several dates to resume talks and is waiting to hear back from school officials. East Providence’s teacher contract does not expire until Oct. 31.

•School and union officials in Glocester scheduled a meeting for last week, but both sides have declined to comment on specifics of the negotiations. Glocester schools have the latest start date this year, as classes are scheduled to begin Sept. 8.