KATHMANDU, Jan 31: Nepal Mathematical Society (NMS) has warned of nationwide agitations to protest the exclusion of mathematics from grades 11 and 12 Biology group. The Ministry of Education, through a ministerial decision on August 6 last year, made Mathematics a non-compulsory subject for Biology group in grades 11 and 12. The Curriculum Development Center(CDS) Sanothimi has already finalized the curriculum to be implemented from the next academic session which begins in April.