STEP 1: Accessing the S1-IS Login Page 1.1 Go to www.moe.gov.sg/s1-posting and select the S1-IS link. This will take you to the S1-IS Login Page. 1.2 Provide the student's BC Number or FIN along with the S1 PIN. 1.3 Click the button to access S1-IS. This will lead you to the S1 Eligibility(ies) Page.