You can disable students timetables and homerooms from the parent connectED account either from the board level for all schools or one school at a time. 

Board level > more tools> security>edesmbli connect> go 

Click on settings> edit the page

Make sure the following permissions are unchecked if you don't want the parents to see this information in connectED > save 

Say Yes to this popup to push to all schools 

You will need to enable this permission again if you wish to have this visible to the parents.