Teachers regularly receive information about student performance, but feedback on their own classroom practice is much less frequent. Formal observations may happen only a few times each year, and it can be difficult to remember the details of a lesson while teaching it.
TeachFX approaches this problem through classroom audio. A teacher records a lesson using a phone or laptop, and the platform analyzes the conversation. It then produces a private report showing patterns such as teacher talk, student talk, questioning and wait time.
The idea is interesting because it gives teachers evidence they can revisit after a lesson. At the same time, classroom conversation cannot be reduced to talk-time percentages. This TeachFX review examines what the platform measures, how teachers might use the results and what schools should consider before recording classroom audio.
What Is TeachFX?
TeachFX is an AI-supported instructional coaching platform designed to help teachers reflect on classroom discourse.
Teachers record a lesson, and TeachFX processes the audio to identify conversational and instructional patterns. The resulting report may show:
- Teacher and student talk time
- Group talk
- Silence and think time
- Teacher questions
- Open-ended questions
- Student questions
- Short student responses
- Long stretches of teacher talk
- Instances where the teacher builds on a student contribution
- Examples of selected practices from the lesson transcript
The focus is primarily on student voice: how often students contribute, how teachers invite participation and what happens after a student speaks.
TeachFX can be used independently through a limited free trial. The company also works with schools and districts through paid partnerships that combine platform access with professional development.
TeachFX Features at a Glance
| Feature | What it provides | Possible teacher use |
|---|---|---|
| Audio lesson recording | Captures classroom conversation | Review an ordinary lesson without video |
| Talk-time analysis | Estimates teacher, student and group talk | Examine who had opportunities to contribute |
| Question analysis | Identifies teacher and open-ended questions | Reflect on questioning practices |
| Think-time analysis | Detects pauses after teacher or student speech | Consider whether students had time to think |
| Teacher-talk stretches | Locates extended periods of teacher speech | Review whether explanations were purposeful |
| Student-voice insights | Surfaces student responses and questions | Examine participation and discussion |
| Transcripts and audio playback | Links lesson text with recorded audio | Return to specific classroom moments |
| Personalized reports | Selects examples connected to a teaching focus | Support focused reflection |
| Goal tracking | Tracks patterns across recorded lessons | Monitor changes in practice |
| Report sharing | Lets teachers share selected reports | Work with a coach, mentor or PLC |
How TeachFX Works
The process begins with an audio recording. Teachers can use a laptop, phone or tablet and teach as they normally would. Video is not required.
Before recording lessons, teachers may be asked to provide a short voice sample so the system can distinguish the teacher’s speech from other voices in the classroom.
After the lesson, TeachFX processes the recording and prepares a report. The company says reports are generally available within a few hours. Teachers receive a link when the analysis is ready.
The report gives an overview of classroom conversation and highlights selected moments connected to the teacher’s chosen focus. Teachers can read the transcript, click on specific words to hear the corresponding audio and review longer sections of the lesson when more context is needed.
This ability to move between a summary, transcript and original audio is important. A percentage by itself says little about why the teacher was speaking or what students were doing. Returning to the actual moment helps the teacher interpret the measurement.
Related: Best Feedback Tools for Teachers
Examining Teacher and Student Talk
One of the main TeachFX metrics is the division of classroom time among teacher talk, student talk, group talk and silence.
A report might show that the teacher spoke for 60 percent of the lesson, students for 15 percent, groups for 15 percent and the remaining time was classified as silence.
These figures can prompt useful questions:
- Was the amount of teacher talk appropriate for this lesson?
- Which parts required direct explanation?
- When did students have opportunities to develop an idea?
- Did several students contribute or only a few?
- Was group discussion focused on the learning task?
- Did silence represent productive thinking, independent work or disengagement?
A lower teacher-talk percentage is not automatically better. A short explanation of a difficult concept may require sustained teacher input. Safety instructions, demonstrations and storytelling also create legitimate stretches of teacher talk.
The useful question is whether the pattern matched the purpose of the lesson.
Questioning Insights
TeachFX can identify questions asked by the teacher and highlight those classified as open-ended. It can also show which questions produced longer student responses.
This may help teachers notice patterns that are difficult to track while teaching. For example, a teacher may believe that a lesson included several opportunities for explanation but later discover that most questions required one-word answers.
Teachers could use the report to examine:
- The balance of closed and open-ended questions
- Which questions generated meaningful responses
- Whether questions were distributed across students
- What happened after a student answered
- Whether the teacher answered their own question too quickly
- Whether follow-up questions extended student reasoning
The system’s classification should still be checked against the transcript. A grammatically open question does not necessarily require deep thought, while a short question can initiate complex reasoning in the right context.
Think Time
TeachFX also looks for pauses after a teacher asks a question or after a student speaks.
Wait time is easy to underestimate. A few silent seconds can feel uncomfortable during a lesson, leading teachers to repeat the question, add clues or call on someone before students have had time to formulate an answer.
The report can help a teacher locate these moments and ask:
- How long did I wait before calling on someone?
- Did I leave time after a student response?
- Did another student have an opportunity to build on the idea?
- Did I interpret silence as confusion too quickly?
- Was the pause appropriate for the difficulty of the question?
The meaning of silence still depends on context. An audio system may detect a pause, but the teacher knows whether students were writing, thinking, looking at a visual or waiting for directions.
Building on Student Contributions
Another TeachFX insight concerns uptake: moments when the teacher uses a student’s contribution to continue the classroom conversation.
A teacher might restate an idea, ask another student to respond, connect the comment to the lesson or invite the original speaker to explain further.
This matters because students can speak without their ideas affecting the direction of the discussion. Counting contributions alone does not tell us whether those contributions were heard, examined or connected.
Reviewing these moments may help teachers distinguish between participation that fills conversational space and participation that contributes to collective understanding.
Transcripts and Lesson Moments
TeachFX reports surface selected moments that represent the practice being examined. Teachers can also open the full transcript and listen to the associated audio.
A transcript can help a teacher review the wording of:
- A question
- An explanation
- A response to an incorrect answer
- Directions for group work
- A transition between activities
- Feedback given to a student
- A discussion that ended sooner than expected
Automatic transcripts will not capture every word accurately, especially in noisy rooms, overlapping speech or classrooms where several languages and accents are present. Important moments should therefore be checked against the audio before drawing conclusions.
Goal Setting and Progress Over Time
Teachers can select an instructional goal and use repeated recordings to examine whether classroom patterns change.
Possible goals include:
- Increasing student talk
- Asking more open-ended questions
- Extending think time
- Reducing unnecessarily long explanations
- Building more frequently on student ideas
- Encouraging students to respond to one another
A teacher could record one lesson each week, review a single indicator and select one change to try next time. This makes the platform more manageable than attempting to improve every reported metric simultaneously.
Changes across lessons should be interpreted carefully. Class composition, content, lesson format and time of day may all affect the results. Comparing a direct-instruction lesson with a seminar discussion would provide little meaningful evidence of progress.
TeachFX for Coaching and Professional Learning
TeachFX can also be used with instructional coaches, mentors and professional learning communities.
Teachers control whether they share a report. A coaching conversation might begin with questions such as:
- What did you notice?
- Which result surprised you?
- Where did students contribute most?
- What was happening during the longest teacher-talk stretch?
- Which moment would you like to revisit?
- What small change would you like to try?
This is a better use of the data than turning every percentage into a target. Classroom discourse is shaped by subject, age, learning needs and the purpose of the lesson. A coach can help the teacher interpret the pattern within that context.
TeachFX argues that its reports should support coaching and reflection, not teacher evaluation. That distinction is essential. If teachers believe recordings may be used for appraisal, compliance or disciplinary purposes, they may avoid recording challenging lessons or adjust their teaching to satisfy the visible metrics.
Research Behind TeachFX
TeachFX reports that several randomized controlled trials conducted by researchers affiliated with Harvard, Stanford and the University of Maryland found effects on aspects of teacher practice and student experience.
The company also points to research on automated, job-embedded feedback that found changes in how instructors used student ideas during teaching.
These findings are encouraging, but schools should examine the individual studies before treating them as evidence for every feature or setting. The effects of automated feedback may depend on teacher participation, the instructional goal, coaching support and how frequently the reports are used.
TeachFX has also published technical research on identifying speakers and instructional practices in noisy classroom recordings. This work matters because the accuracy of the report depends on correctly distinguishing the teacher from students and recognizing the relevant conversational event.
Privacy and Classroom Recording
Privacy deserves serious attention because TeachFX records teacher and student voices.
According to the company’s privacy policy, recordings may include voices and language spoken in the classroom. TeachFX states that data is encrypted in transit and at rest, that it does not sell student information and that teachers can delete recordings and associated data through their accounts.
TeachFX also says reports are private to the teacher unless the teacher chooses to share them. In district implementations, leaders may receive aggregated or anonymized trends, while individual reports remain private unless shared by the teacher.
Schools should still establish clear procedures before recording begins:
- Confirm that TeachFX is an approved school tool.
- Review district and regional privacy requirements.
- Determine whether parent or student notice or consent is required.
- Explain what is being recorded and why.
- Clarify who can access reports and audio.
- Establish how long recordings will be retained.
- Avoid recording sensitive discussions.
- Provide an alternative when recording would be inappropriate.
The fact that a product can record a classroom does not by itself authorize a teacher to use it.
TeachFX Pricing and Access
Individual teachers can start with a free trial. TeachFX describes this as limited access to the app without the professional-development support included in institutional partnerships.
Schools and districts can purchase broader access, including unlimited teacher use and customized professional-development workshops. TeachFX does not publish a standard public price for these partnerships, so organizations need to request a demonstration or quotation.
The main options are therefore:
- Individual free trial: Limited access for exploring the platform
- School or district partnership: Unlimited app access plus professional learning
- Pilot implementation: A smaller teacher cohort before wider adoption
Strengths of TeachFX
TeachFX has several notable strengths:
- Uses audio instead of requiring classroom video
- Gives teachers feedback whenever they choose to record
- Connects summary metrics with transcripts and audio
- Focuses on specific instructional practices
- Supports teacher-selected goals
- Makes selected reports shareable with coaches or colleagues
- Can reveal patterns that are difficult to notice while teaching
- Treats professional reflection as an ongoing process
Limitations to Consider
The main limitation is that conversation metrics capture only part of teaching.
Other concerns include:
- More student talk does not automatically mean better learning.
- The system cannot fully judge the quality or accuracy of an explanation.
- Automatic transcription and speaker identification may contain errors.
- Talk-time data may overlook gestures, written work and visual interaction.
- A quiet student may still be cognitively engaged.
- Group talk may be productive, confused or unrelated to the task.
- Results may encourage teachers to optimize visible metrics.
- Recording student voices creates privacy and consent responsibilities.
- Full access requires an institutional partnership with unpublished pricing.
The report should be read as evidence for reflection, not a complete account of teaching quality.
Final Thoughts
TeachFX addresses a genuine gap in teacher professional learning. Most teachers receive little detailed feedback on everyday lessons, and classroom observations are too infrequent to support continuous experimentation.
Its best use is as a private reflective tool. A teacher records an ordinary lesson, studies one or two patterns, listens again to key moments and chooses a small change to try.
I would be cautious about using TeachFX for evaluation or turning its metrics into universal benchmarks. The educational question is not simply how much students talked. It is what they were talking about, whose ideas were heard and whether the conversation helped them think more deeply.
