I never allow that as an answer in class, but up until this summer, I never felt like a had a good response when a student says "IDK" because I can't help but think they really mean "I don't care." My friend Melanie and I went to a session when we were at CAMT and the presenter talked about other sentence starters for students who need more help to answer questions. In essence, they are 5 alternatives to using "IDK" in the classroom. Of course, we both had to make posters to put in our classroom! Here's mine:
Don't worry, I wouldn't share anything if I wasn't going to make it available to you...so click here to download it for FREE from my Teachers pay Teachers store!
This is formatted to print out on 11x17 paper. You can send it to any office supply/printing center and have printed. Office Max is printing mine for less than $2!
Let me know what you think! Do you have any ways to get kids past the "IDK" statements?