Soccer Online is arcade football in a browser tab: small teams, short matches, simple controls and a goal at each end. You control one player at a time, the game switches to whoever is nearest the ball, and the physics are forgiving enough that anyone can score in their first match.
It isn't a simulation and doesn't try to be — no formations to manage, no stamina, no offside. What it has is a two-minute match you can finish before a break ends.
It supports matches against other players as well as against the computer, depending on the mode you pick. No account is needed.
Shoot across the keeper toward the far post rather than straight at goal, and create the angle by passing rather than dribbling into a crowd.
It runs in the browser with nothing to install, so it works on a school Chromebook wherever the site loads.