The Asian headteacher fought against strong opposition from parents and teachers to secure his position at Wilkes Green junior in Birmingham 15 years ago.
He said: "I could write a book about myexperiences of racism. It has held me back at every level.
"People wanted to test me and would not accept my rules. I was rejected from at least half the jobs I applied for because of who I am rather than my skills. Whenever people consider applications for a job they have preconceptions of me, and my turban also affects their first impression."
Mr Mangat, who has a postgraduate teaching qualification and has been awarded an MBE, believes leadership courses will encourage a change in attitude.
He said: "Race relations acts are one way to change attitudes but you also need to equip people to cope with circumstances."