Variable In CURSOR Sql Statement (was Please Help Me)

Hi All,

What i am trying to do is concatenate variable "@Where" with CURSOR sql statement,inside a procedure . But, it doesn't seem to get the value for
the @Where. (I tried with DEBUGGING option of Query Analyzer also).

=============================================
SET @Where = ''
if IsNull(@Input1,NULL) <> NULL
Set @Where = @Where + " AND studentid='" + @input1 +"'"

if isnull(@Input2,NULL) <> NULL
Set @Where = @Where + " AND teacherid =' " + @Input2 +"'"

DECLARE curs1 CURSOR SCROLL
FOR SELECT
firstname
FROM
school
WHERE
school ='ABC' + @where
=============================================
Please check my SQL Above and Could somebody tell me how can I attach the VARIABLE with CURSOR sql statement ?

Thanks !