Improvisation is a fundamental aspect of musicianship and an important pursuit in music education. Children in music classes throughout the world are engaged with improvisation in a variety of modes and settings. Whether singing, physically moving, or playing an instrument, the act of improvising in front of others may raise one's self-consciousness, potentially leading to feelings of fear and anxiety. We wish to share guiding principles for improvisation to alleviate many of the associated fears. The establishment of a classroom improvisation culture may breed willful participation and acceptance. When willful participation and acceptance become habitual, the goal of establishing a safe space for students to explore their musical creativity is more readily achieved. A manifestation of the guiding principles is shared in the form of two model improvisation experiences for the general music classroom.