The county council proposals involve scrapping all middle schools in the county.
It is claimed the current three-tier structure holds pupils back and children will achieve better results moving straight from primary to secondary school.
Councillors have yet to consider the plans.
The future of the schools in Salisbury, Wilton, Tisbury and Mere is uncertain.
The chairwoman of the working party, Councillor Carole Soden, said the authority would hope to avoid making teachers redundant.
"The plan involves closing five schools," said Ms Soden.
"We would look at each school very carefully and see which ones are in the best condition and which ones were surplus to requirement.
Retain teachers
"We've been concerned for some considerable time about the progress in the middle school system, the children are not making the same progress as children in a two-tier system.
"Children move from middle schools to secondary schools in the middle of key stage in the national curriculum which is a vital time in their education which would be avoided in a two-tier structure.
"A lot of parents are opting-out of middle schools because they don't want to move their children at such an important time," she said.
"We have a shortage of teachers in Wiltshire so we would hope there wouldn't be any redundancies.
"We may be creating more teaching post in the long term because fewer pupils will be opting-out so there will be more children in the system," she said.
A report by the working party will be considered by the council's education panel on Friday 8 February.