Uncleared sidewalks were the biggest problem for schools that opened Tuesday in Spokane. And roofs were the issue for some that didn’t. Many districts canceled classes Tuesday – extending winter break to 20 days instead of the planned 17 – so crews could shovel snow from roofs. In other areas, the work continues, with Coeur d’Alene, Liberty, Freeman, Mead, Central Valley, Riverside and Rathdrum-based Lakeland districts among those canceling classes again today.