by Jeff Snyder
can, can't, must, mustn't, have to, don't have to, should, shouldn't

48 questions
One question set, multiple game modes. Tap any game to see it in action. Not sure which to pick?
Two teams place stones on a Go-style board by answering correctly. Capture territory to win.
2 teams, up to 40 students
The class is trapped in a biolab. Answer questions to restore power and crack the passcode to escape before zombies break in.
Whole class, up to 40 students

The whole class works together to blast through walls and defeat monsters. Correct answers deal damage to the current obstacle.
Whole class, up to 40 students
Two teams pull a rope. Each round, the team with more correct answers tugs the rope their way. Pull the other team into the mud to win.
2 teams, up to 40 students
Answer a question, then swat bugs on screen for bonus points. Combines quiz review with an action mini-game.
Up to 40 students
Students race through questions at their own speed. Streak bonuses reward consecutive correct answers. Power-ups add chaos.
Up to 40 students
Teacher-paced. Each question appears on every screen at once. Speed bonuses for fast answers. Live leaderboard on the projected screen.
Up to 40 students
You ______ swim across the river now because it is too wide and dangerous.
My little sister is only four, but she ______ count to 100.
I ______ hear you very well because the music is too loud.
Ben is a great guitarist. He ______ play many difficult songs.
We ______ enter the room because the door is locked.
Sarah practiced every day, so now she ______ speak English quite confidently.
My grandmother is 82, but she ______ still walk to the market by herself.
Lisa is very good at languages. She ______ speak three languages fluently.
We ______ use this app on our phones because it works on both Android and iPhone.
I ______ lift this box by myself because it is much too heavy.
You ______ see the stars tonight because the sky is full of dark clouds.
Tom ______ come to football practice today because he has a broken leg.
You ______ wear a seatbelt in the car. It is the law.
Students ______ be quiet during the exam.
I ______ finish this report today because my boss needs it now.
You ______ stop at a red light.
We ______ take our passports to the airport.
He ______ see a doctor soon because his cough is getting worse.
You ______ touch that wire. It is dangerous.
Students ______ run in the hallways at school.
We ______ feed the animals at the zoo. There is a sign that says no.
You ______ tell anyone this secret.
He ______ park here. This space is for buses only.
People ______ use their phones during the movie.
I ______ wear a suit to work. The office is very formal.
We ______ leave early tomorrow because the train is at 6:00 a.m.
She ______ study hard if she wants to pass the test.
My dad ______ work on Saturdays this month.
You ______ show your ticket before you go in.
Tom ______ take medicine every day for his allergies.
You ______ come to the meeting if you are busy. It is optional.
We ______ bring any food because the hotel provides breakfast.
She ______ wear a uniform at her new school, so she can wear her own clothes.
I ______ get up early tomorrow because it is a holiday.
He ______ pay today because he already paid online.
Students ______ buy this book if they already have a copy at home.
You ______ take an umbrella. It looks like rain.
He ______ talk to his teacher if he does not understand the homework.
We ______ leave now if we want to arrive on time.
She has a headache. She ______ rest for a while.
You ______ check your answers before you give the test to the teacher.
They ______ save some money instead of spending it all.
You ______ eat so much candy before dinner.
He ______ stay up so late on school nights.
We ______ be rude to the waiter.
She ______ carry that heavy box by herself.
You ______ drive so fast in the rain.
They ______ leave their bags on the floor because someone might trip.
