Instructional Coaching and Mentoring: How to Plan Lessons That Develop Other Teachers

Instructional coaching is one of the most effective professional development models in education — and one of the most poorly implemented. The difference between coaching that improves instruction and coaching that produces compliance, resentment, or indifference almost always comes down to how the coaching relationship is structured and how post-observation feedback is delivered.

If you're a coach, a mentor, or a department head who works with other teachers, your lesson planning skills transfer — but the audience has changed.

The Coaching Cycle: The Only Structure That Works

Episodic, drop-in observation produces almost no instructional improvement. The teacher doesn't know you're coming, the observation yields data without context, and the debrief is a brief conversation that leaves no trail and has no follow-up.

The coaching cycle that produces change has four phases:

1. Pre-conference: Coach and teacher meet before the observation. Teacher identifies the specific instructional challenge they want feedback on. Coach confirms focus and plans the observation tool.
2. Observation: Coach observes with a specific focus, collecting objective data (scripted teacher talk, tallied student responses, time on each phase). Not evaluative notes — data.
3. Debrief: Coach presents data, asks questions, and lets the teacher make meaning before offering analysis. The teacher speaks first.
4. Goal-setting: Based on the debrief, teacher and coach identify one specific next step, with a concrete plan for implementation and a follow-up date.

The cycle is not optional. Without the pre-conference, the observation lacks context. Without objective data, the debrief is opinion. Without the teacher speaking first, the coach's analysis replaces the teacher's thinking. Without a follow-up date, accountability is absent.

Pre-Conference: Identifying the Right Focus

The most important skill in instructional coaching is helping a teacher identify the specific instructional issue that, if addressed, would most improve student learning in their classroom.

This is rarely the issue the teacher initially names. Teachers often present surface issues: "My students are disengaged" or "the lesson didn't go the way I planned." The coaching pre-conference drills down to the instructional behavior beneath the symptom.

Pre-conference questions:

• "Walk me through what you're planning. What are you hoping students will be doing and thinking?"
• "When you imagine this lesson going really well, what would I see?"
• "What's the biggest challenge you anticipate? What would you want me to focus on?"

A pre-conference that takes 15 minutes and lands on a specific observable focus saves enormous time in the debrief and produces more actionable feedback.

Observation Data: What to Collect

Vague observation notes ("engaged students," "clear explanations") produce vague feedback. Objective data produces specific, discussable evidence.

Observation data worth collecting:

• Teacher-student talk ratio: What percentage of the instructional time is teacher talk vs. student talk?
• Question type tally: What percentage of questions were procedural/recall vs. open/analytical?
• Participation mapping: Which students responded? How many responses came from the same students?
• Wait time: How many seconds between the teacher's question and student response? Between responses?
• Scripted talk: Verbatim transcript of the most critical instructional moments

One of these per observation is enough. The specificity of the data determines the specificity of the coaching conversation.

Debrief: The Teacher Speaks First

The coaching debrief is where change happens — or doesn't. The most common coaching failure is the coach explaining what they saw and telling the teacher what to do differently. This produces defensiveness, compliance, and no lasting change in practice.

Teacher-first debriefs:

1. Show the teacher the data
2. Ask: "What do you notice?"
3. Ask: "What does that tell you about what students experienced in this lesson?"
4. Ask: "What would you do differently?"

Only after the teacher has made meaning from the data does the coach add perspective: "I also noticed... What do you make of that?" or "One thing I'd add is..."

A teacher who has named their own problem and identified their own solution is more likely to change than a teacher who received a prescription. The coach's job is to help the teacher see their practice clearly, not to impose a different practice.

Co-Planning as Coaching

Some of the most effective coaching happens not through observation but through co-planning — sitting alongside a teacher as they plan a lesson and asking questions that improve the plan.

Co-planning coaching questions:

• "What do students need to know coming in for this to work?"
• "Where do you think students will struggle? What will you do when that happens?"
• "How will you know if they got it before the lesson ends?"
• "If 40% of students are confused at this point, what's the plan?"

These questions surface the invisible assumptions in a lesson plan — and they're less threatening than post-observation feedback because you're addressing the plan, not the teacher's performance.

Instructional coaching is not evaluation. It's the systematic support of a professional trying to improve a difficult practice. The teachers who improve the most are the ones with coaches who take that distinction seriously.