Mathew Kirkpatrick, a classroom assistant, expressed the feeling of being undervalued and said, "Everything is going up, bar our wages."
Unison, GMB, and Nipsa members will join the strike on Thursday, making it one of the biggest strikes among non-teaching unions in years.
Special schools are closed during the strike, causing disruptions to school services.
The strike, starting on Wednesday, is set to continue until Thursday midnight.
The Education Authority cited significant disruption due to the strike and expressed that there is currently no budget for proposed pay increases.
Despite their reluctance to strike, workers are advocating for fair compensation, emphasizing their commitment to their roles.
This strike underscores the challenges faced by school support staff in Northern Ireland regarding pay and grading issues.