the Help fiels are not bad for this but basically
set your data source for the report (your tables or view or whatever)
go the the fierld explorer
right click on the parameter fields
select new
add a new parameter called "course type" (or whatever)
make it a string type
click on dynamic togge
click on the value column and select the field that points to the 'types'
add a desctription if you want
click on the Paramters colum to add the param.
if you need multiple values change that value in the options box in the bottom to true
in the select expert use the statment
{table.typefield} = {?course type}