Youth role models 'corrupt'
Many of the role models of South African youths - teachers, principals and school governing body members - are implicated in widespread corruption.
Teachers have sold test papers or asked for sex in exchange for better marks, and principals and governing bodies have misused school funds.
NGO Corruption Watch commissioned MXit company Pondering Panda to use the social media network to gauge the extent of the problem.
The survey was commissioned by Corruption Watch because of the large number of calls it received about abuses and corruption at schools.
The NGO's director, David Lewis, said: "The educational environment is one in which teachers and principals are not there merely to deliver a service - they are also role models.
"The long-term consequences of corruption in schools are very disturbing."
The misuse of school money was the most common complaint of the survey's 3284 respondents.
Most of the respondents were studying at government schools or further education and training colleges.
70% blamed school principals for misusing money or property;
60% said teachers asked favours in exchange for good marks;
Selling of test papers was a problem, particularly in Mpumalanga;
Misuse of money was common in North West and the Free State;
Eastern Cape had more corrupt principals than any other.
The director of the Legal Resources Centre, Sarah Sephton, who is involved in court cases involving schools in Eastern Cape, said she was not surprised by the results of the Corruption Watch survey.