How to insert value into primary key column in SQL Server?

if you got this error message when trying to run this SQL: An explicit value for the identity column in table 'Student' can only be specified when a column list is used and IDENTITY_INSERT is ON.

Used below query 

SET IDENTITY_INSERT StudentON;

Insert into Student(classID,ClassName,schoolID) values(1976,'Grade 1',178)

SET IDENTITY_INSERT Student OFF;

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Thank you