Coaches work one-on-one with teachers or in a small group setting with teachers to build student achievement in the classroom based on data collected and discussed teachers or coaches. According to Melinda Mangin and KaiLonnie Dunsmore, instructional coaching models may include "cognitive coaching, clinical supervision, peer coaching and mentoring, formal literacy coaching, informal coaching, or a mixed model." "Other researchers have described categories of coaching such as data-oriented, student-oriented, managerial, and coaches who work with individual teachers or with groups of teachers". Ultimately, coaching roles are designed to increase teacher capacity and push teacher improvement through learning opportunities. Instructional coaching is embedded within a teacher's work; in other words, the coach works with the teacher throughout the school year and meets during the school day with the teacher regarding current lessons, planning, and the observations and data collected. Discussions between the instructional coach and teacher are built upon mutual respect and a trusting relationship through confidentiality. Overall, instructional coaching is meant to serve as professional development for the teacher.