Perfect Circle is a free-to-try draw-a-perfect-circle game for the classroom. Draw a circle freehand — with a mouse, a finger, or a whiteboard pen — and it's instantly scored out of 100 for how round it is, with a fun accolade to match. A truly perfect circle is almost impossible by hand, which is exactly what makes it such a moreish brain break, starter or reward. No prep, no printing, nothing to install.
Is there a free-to-try draw-a-perfect-circle game?
Yes — Perfect Circle is a free browser game. Draw a circle freehand with a mouse, finger or whiteboard pen and it's scored out of 100 for how round it is. Sign in with a free Sage Teachers account to play.
How is the circle scored?
It measures how close your freehand loop is to a true circle — how consistent the radius is around the centre — and gives a score out of 100 with a fun accolade to match.
Can the whole class play?
Yes — there's free play (one go at a time), head-to-head (two players, three rounds), and a whole-class mode that loads your class list for a live leaderboard and a podium finish.
What is a good perfect-circle score?
Anything above about 85 out of 100 is very good — a truly perfect circle is almost impossible to draw freehand, which is what makes it a fun brain-break challenge.
More brain breaks and quick games for the board: Spin the Wheel, Bouncy Balls, and Countdown.