Labour unions opposed the plans to sack the teachers and branded the move "propaganda".
Governor Ayodele Fayose on Tuesday criticised President Buhari for supporting Governor Nasir El-Rufai in the planned sack of Kaduna teachers who failed the recently conducted competency test in the state.
On Monday, President Buhari expressed his stance at a special retreat of the Federal Executive Council in Abuja held at the banquet hall of the Presidential Villa.
The President while touchong on the Kaduna situation, said: "It's a very serious situation when teachers can not pass the exams they're supposed to administer to their students".
Buhari said: "Being an orphan, I still feel that boarding school moulded me". Is a very tragic situation we are in'. I spent nine year in boarding school, three in primary school and six in secondary school.
"In those days, teachers treated their students like their own children".
"I won't mention his name but when he went, he couldn't differentiate between the students, the children and the teachers. If you did well, they told you, you did well, if you didn't do well, they never spared the rod", he said.
"And what el-Rufai is trying to do now is exactly what that man told me about 10 years ago".
Buhari said the effect of decay in the education sector is glaring, assuring that his administration is determined to change the situation for the better.
Despite the opposition to the move the sack the "unfit" teachers, Mr. El-Rufai has said there is no going back, while the state government has started receiving applications for the 25,000 teachers to be employed.
The governor stated that his administration would disengage about 20,000 unqualified primary school teachers to restore confidence in public schools.
The governor then announced that the state will sack the 22,000 teachers that failed the test and recruit 25,000 new teachers to replace them.