It is often hard to realize how much you know about a subject when you are in the thick of it. This was especially hard for me to comprehend as a teacher. All those little eyes looking up at me, believing with their whole heart that I knew everything about the world. In truth, none of us know everything, but we are all experts in what we practice on a daily basis. So if you find yourself answering friend's questions about Instagram like a pro, setting up a photo shoot while talking to your grandma about the news, or dominating a conversation about social media best practices, then chances are you are an expert. Just in case, here are three areas with corresponding questions to evaluate your expertise.