For isca

Yes, it will be applicable for May 2016 Exams.
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It’s too early to worry about the new proposed curriculum, where ISCA has been removed as a standalone subject. Its implementation will take time.
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Anyhow, students under the existing curriculum will get time to pass the exams, until the scheme is phased out.
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Similar approach was also followed when PCC scheme was launched in 2006 and old intermediate & final students were given sufficient time to pass the exams.