Sometimes you can and sometimes you can't. I have walked to school in several snowstorms with the kids. Taking out the sleighs and making it fun, however it takes about double the time. But, at times, I have informed the parents I would not be able to make it. In this case, I allow the parents to chose if they want to make alternative plans or if they stay with me for a snow day. I found when my d/c kids were in pre-k and k, it was easier to just keep them here, but now being in 1-2 grade, we can not easily justify them missing a day of school!