The closure of Parkfield School at Hurn has been approved by ministers.
Reach South Academy Trust confirmed that the school will partially close its doors next month before a full closure in August 2025.
In a statement it said all children bar year 11 have been allocated a place at an alternative local school from September.
The trust added that it had been a challenging time for all involved since the closure was first announced in June.
However, there were no other options to keep the school open.
The full statement reads: “We have now formally received ministerial agreement for Parkfield School to close.
“This means that Parkfield will close partially at the end of August 2024 and close fully to the remaining year 11 students at the end of August 2025.
“All children bar year 11 have now been allocated a place in a local school from September.
“For the year 11s staying with us next year, we have a full team in place to support their studies and everyone is fully committed to making this a positive experience for all students, setting them up for future success as they take their next steps.
“Whilst none of us would have wanted this outcome, given there were no other options to keep the school open every decision taken has been with the best interests of the children in mind.
“We fully understand though the upset and worry this has caused our school community and want to thank our staff and our families for their understanding through this really challenging time.”