Raveendranath should quit owning moral responsibility for the leak, he said.
Chennithala also demanded a judicial probe into 'lapses' in setting the question papers and their leak. The agitation was inaugurated by interim Kerala PCC President M M Hassan.
The Congress-led UDF also organised protest marches on the question paper issue in all district headquarters in the state.
In a letter to Chief Minister Pinarayi Vijayan, Chennithala said there were also complaints of mistakes or questions being out of syllabus in the papers of geography, Hindi and journalism.
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"Teachers of KSTA have close connections with private tuition centres," he said adding many of the questions in the model papers prepared for the exams in such centres appeared in SSLC question papers."
The government had cancelled the SSLC Mathematics examination held last week and decided to conduct a re-examination on March 30.
Following a departmental probe, the government had suspended two teachers who were responsible for setting question papers for SSLC.
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