Live Quiz Battles for
Run live quiz battles for statics, thermodynamics, circuits, fluids, and more — in about 60 seconds. LaTeX equation rendering built in. Students join with a code, no accounts required.
No student accounts • Unlimited participants free • Manual creation free forever
Write quantitative questions with proper notation. LRNRS renders inline math so students see equations correctly formatted — not raw LaTeX code — on their own devices. Works for mechanics, E&M, thermodynamics, and more.
Engineering questions need to be read carefully. Unlike Kahoot — which shows questions on a projector — LRNRS shows the full question, equations and all, on each student's phone or laptop. No projector needed.
Set up to 120 seconds per question — enough time for simple back-of-envelope calculations. Useful for conceptual checks where students need to work through a brief calculation before answering.
After a battle, you see question-by-question accuracy across the class. If 70% of students got the moment equilibrium question wrong, that tells you where to spend the next 15 minutes of lecture.
LRNRS works for any engineering course with quantitative content. Pages with dedicated examples:
Statics
See page →Free body diagrams, moment equilibrium, truss analysis
Thermodynamics
See page →Laws of thermo, heat engines, entropy, Rankine cycle
Circuits
See page →Ohm's law, Kirchhoff's rules, op-amps, AC/DC analysis
Dynamics
Newton-Euler equations, kinematics, energy methods
Fluid Mechanics
Bernoulli, continuity, pipe flow, Reynolds number
Materials Science
Stress-strain, crystal structure, phase diagrams
Signals & Systems
Fourier transforms, Laplace, LTI systems
Engineering Math
ODEs, linear algebra, numerical methods
Step 1 — Create your battle
Enter your email and a battle name. Write up to 10 questions free, or use Creator Monthly ($9.99/mo) for up to 40 questions per battle plus monthly AI credits. Add images of diagrams or free body sketches if needed.
Step 2 — Students join instantly
Display the join code. Students go to lrnrs.ai/battle, enter the code and a name — no account, no Google sign-in. Works on any phone or laptop in seconds.
Step 3 — Act on results
See which questions the class struggled with. Adjust your lecture on the spot, or generate targeted follow-up practice using AI credits for the specific concepts that need reinforcement.
Free
$0/mo
Up to 10 questions, unlimited participants, live leaderboard, post-battle accuracy stats. Great for quick concept checks.
Creator Monthly
$9.99/mo
Up to 40 questions per battle + 30 monthly AI credits. Build larger reviews and generate AI questions/remediation quickly.
AI Credit Packs
from $1.99
Top off anytime: 3 for $1.99, 10 for $4.99, 30 for $11.99, or 100 for $29.99.