stored procedure with more than 1 value for each parameter

In an SSRS 2008 r2 report, I am currently calling a stored procedure called spRoom. I obtain the results of the stored procedure
by creating a  temptable called #roomReults

The temp table that I am creating and using to obtain results looks like the following:

CREATE TABLE #roomResults(
                 studentID VARCHAR(15),
   endYear SMALLINT,
                 calendarID INT) 
INSERT  #roomResults
       EXEC [dbo].[spRoom] @endYear, @calendarID 

Currently I am only passing in one value for both paramters called: @endYear and @calendarID. However now I want to pass
in several values to each parameter.

I want to change the sql to look like the following:
 EXEC [dbo].[spRoom] IN (@endYear), In (@calendarID)

The above gives me syntax errors.

Thus I am wondering if you can show me how to change the sql listed above so that that I can pass in more than one value from the SSRS report parameters called @endYear and  @calendarID to the stored procedure called [spRoom]?