Makarantar Grammar Iganmode makarantar sakandari ce a Ota, Jihar Ogun, Najeriya da aka kafata a 1960. shugaban makaranta shine Mista Olalekan Akinosi. Makarantar Grammar ta Igamode ta yi daidai da abin da aka tsara na waƙar ta ta hanyar lashe gasar Cowbell makarantar gasar ilimin lissafi ta jama,a (NASSMAC) na yanayi uku a jere a 2011, 2012 da 2013. Kodayake, makarantar gwamnati, ɗaliban Makarantar Grammar Iganmode, waɗanda ake kira IGS ta ɗalibanta sun kare lambar yabo ta lissafin Promasidor NASSMAC ta baya-baya don haka suna tattara yabo ga makarantar. A karon farko a tarihin gasar Cowbell National Mathematics a Makarantun Jama'a na Najeriya, ɗaliban Iganmode Grammar School (SNR) Ota sun sami babbar kyauta mafi girma na shekaru uku a jere, 2011, 2012 da 2013