I was working with a 5th grade kid, who is on the autism spectrum, today. We was getting a baseline for the voiceless "th" sound. I started with a word list with the sound in the medial position. The first word was "anything". So, I said, "Say anything." The student complied and said "goose". I was a little befuddled at first, it took me a second to realize that he was just following my instructions.