Teachers lack a reliable, affordable way to wirelessly project and annotate their tablet screen on a classroom projector while moving around the room.

Existing solutions either require expensive interactive boards not available in all classrooms or tether the teacher to a fixed position, preventing them from circulating and checking student work.

Severity

3Medium

Willingness to Pay

implied

Added

Jun 4, 2026

App Concept

TeachFlow Mobile

TeachFlow is a mobile app that wirelessly mirrors a teacher's tablet screen to any projector or display, with real-time annotation over PDFs and Google Slides. It supports touch or stylus writing, runs on low-cost hardware, and works with standard projectors via a simple dongle or built-in casting, freeing teachers to walk around the room and engage with students.

Key Features

Wireless screen mirroring to any projector via Chromecast, AirPlay, or HDMI dongle
Real-time annotation on PDFs, Google Slides, and images
Stabilized writing input to reduce jitter while walking
Split-screen mode to show student work alongside lesson materials

Target Users: K-12 and college teachers in classrooms with projectors but no interactive whiteboards, especially those who want to circulate while teaching.

Revenue Model: Freemium with $9.99/mo pro tier for annotation and advanced features; institutional licenses at $4/seat/mo for schools.

Existing Solutions Mentioned

Promethean boardsProjector

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