Some of my kids were able to do it after a brief review of questions and sentences, while others had to use the question word visual throughout most of the activity. They looked at the initial word to determine whether it was a question word or not; then sorted accordingly.
Next up, we completed the worksheet below. The kids went through and added a period or question mark to the following sentences. To purchase this packet of visuals and worksheets, visit my TPT store here.
Since I hadn't used these exact versions before in my classroom, I was excited at how well they went over. The kids did really great and it was easy to fade out the visual for some of the more advanced students. Also, after we read our books in guided reading, I've been having my most advanced group write questions to ask one another. They have been doing awesome with this after this review! I created this visual from an idea I saw on Pinterest and my version is available as a FREEBIE here.