Get table name from trigger

CREATE TABLE Lesson
(
lID nchar(4),
lName nvarchar(30)
)
GO

CREATE TABLE SaveLog
(
tblname nvarchar(20),
objID nvarchar(20),
whatDO nvarchar(20),
sysUser nvarchar(20),
theDate datetime
)
GO

CREATE TRIGGER InsertTrig
ON Lesson
AFTER INSERT 
AS BEGIN
INSERT INTO SaveLog(what should i write here? pls, help me...)
END

INSERT INTO Lesson VALUES('NU01', 'Math')

SELECT * FROM SaveLog