15 unknown schools in Khurasan (4^th Hidjri until 6^th Hidjri century)

Learning of Islam for Iranian proselite Muslims necessitated the genesis of some institution such as: mosque, scribe and religious school. The primary well-known schools which had cultural continuity over 4-6 Hidjri century, come to existence in this cities of Khurasan and Mawara' al-Nahr.considering the significance of school as a higher-education center, many inquiries have been done on [and about] it. Although many schools of Khurasan are presented in such inquiries, but a few of them are neglected. In this paper, afterwards, a survey review, based upon some resources, has been done over the name of the well-known schools in cities of Khurasan and Mawara' al-Nahr, then 15 other schools are presented; moreover the number of schools of Khurasan and Mawara' al-Nahr cities is compared by means of the tables and graphs.