Marita Coyne has been trying to find a secondary school place for her son Robbie for the last two years after being rejected 17 times.
"It was good for him at the time for socialisation, but he needs to move on to a different pathway now," she said.
she said.
"Essentially it'll most likely be November, mid-November, that it opens."
Ms Coyne said the people 'on the ground', such as the Special Educational Needs Officers, are helping her.
"These are people on the ground that are thinking outside the box and trying to find a solution for Robbie," she said.
"They're failing our kids who need this support most and they're the most vulnerable in society.
"Our kids are falling through the cracks".
'Last week cracked me'
Ms Coyne said she began to look at homeschooling, but didn't realise an important detail.
"I wasn't aware that home tuition has to be organised by the parents," she said.
"I just felt that it was another thing up against us that I had to fight for."
Ms Coyne said she is now trying to find a tutor for Robbie, but believes by the time
"the permanent school most likely will be open for him."'These children need the next step'
Ms Coyne said her son always needed a school place.
"There's no pathway, there's no proactive planning for our kids," she said.
"Robbie was born with Down Syndrome, that diagnosis is not going to change.
"It's no surprise he has to move from junior to senior to secondary and there on after to the next stage of his life: so why isn't there proper planning put in place for our children?
"The department knows that these children need the next step and they need life skills.
"They need help through the education system into adulthood and beyond, and they're not getting it," she added.