The purpose of this study was to find different teaching strategies on the harmonica to solve the problem with everything happening inside the mouth, hidden from sight. We also madecomparisons to singing, having the same teaching prerequisites, to see if there where anysimilarities. To this end we interviewed four experienced harmonica teachers as well as studied instructional material on both harmonica and singing. The results of the interviewswere divided into, by us, chosen categories. Conclusions in short: We found several differentstrategies that are commonly used, and that the best way to make sure the student understands, is to combine several of those. Which combination to use depends on the student. We foundsome similarities with singing, but not as many as we had hoped for.