Two Shelley College workers have been sacked for an alleged fraud.
The two support workers were dismissed after a police investigation into computers and other equipment totalling £30,000 were traced to eBay.
The alleged fraud came to light over the last few months after the college noticed an increase in ordering of goods from their suppliers.
Further investigations revealed anomalies in excess of £30,000.
Items ordered included expensive computer parts and stock such as ink cartridges and desktop computer equipment which was not needed for the college.
Police were contacted and further investigation has identified many items, believed to be from the school, being sold on internet auction sites.
The two male support staff have since been dismissed. A third person has also been arrested.
Shelley College Headteacher John McNally said: “Staff are shocked and disappointed at the alleged actions of two members of support staff.
“We are grateful this has been identified to allow steps to be taken to tackle it.”
He said the college, which was graded by Ofsted as Outstanding in June, are fully supporting the West Yorkshire Police investigation.
Officers leading the fraud investigation have praised the college for identifying the alleged fraud quickly, saying often cases can go undetected for years.
Det Insp Jim Griffiths, from Kirklees CID, revealed details of the complex investigation.
He said: “Through robust and quick action, the school has prevented this issue from becoming a serious problem.
“Frauds such as this are often extremely difficult to identify and we often sees situations such as this running on for years undiscovered.
“It is only through extremely tight control measures and early intervention that has prevented the school from significant loss.”
Police confirmed 33-year-old and 28-year-old men have been arrested and are on bail.
A 27-year-old woman has also been arrested.
Enquires are ongoing.