Access Control Lists

Access Control List
I have a network with 512 subnets, 256 for staff, 256 for students. 126 hosts per subnet.Staff hosts are from 150.28.0.1 to 150.28.127.254. Student hosts are from 150.28.128.1 to 150.28.255.254. I need to apply an extended ACL on interface E0 of the router to deny student hosts telnet access, while permitting students all other access. Also need to permit staff hosts full access.
Need help with correct ACL configuration. Please include correct syntax.