Learn five things in this order: how a match works, offside, who plays where, how a league table works, and why fans care so much about one club. Then watch a full match with someone who already follows the game and ask them everything. You don’t need the whole rulebook; the official IFAB Laws of the Game are free online when you want the exact wording. If you’d like it as a short course, Onside: Learn Football (we make it) teaches the same steps in three-minute daily lessons.
1. How a match works
Two teams of up to eleven, one of them a goalkeeper (Law 3). Two halves of 45 minutes (Law 7), plus time the referee adds back for stoppages. The clock counts up, not down, so “90+4” means the fourth added minute at the end of the match. Most of the drama in the final minutes comes from that added time.
2. Offside, in one sentence
An attacker in the opponents’ half who is nearer their goal line than both the ball and the second-last defender (the goalkeeper is usually the last one) at the moment a teammate passes is offside if they then get involved in play. That’s the core of Law 11. Two details make replays easier to follow: it’s judged at the moment of the pass, not when the ball arrives, and you can’t be offside straight from a throw-in, goal kick or corner.
3. Who plays where
Counting from the back: a goalkeeper, defenders, midfielders and forwards. A formation is just those outfield groups counted from the back, so a 4-3-3 is four defenders, three midfielders and three forwards (the goalkeeper isn’t counted). Once you know that, the graphic shown before kickoff makes sense, and you can start noticing when a team changes shape during a match.
4. How a league works
In a league, every team plays every other team and earns points for wins and draws; the table ranks them by points. In the Premier League, clubs level on points are separated by goal difference, then goals scored, and the clubs finishing 18th, 19th and 20th are relegated to the Championship, replaced by three promoted clubs (Premier League relegation FAQ). Relegation is why a match between two teams near the bottom can matter as much as a title decider. Other leagues have their own rules, so check the one you follow.
5. Why fans care about one club
The rules explain the match; the club explains the noise. Picking a team makes every match matter to you, and there’s no wrong reason: a city you lived in, a player you like, a friend’s team, a shirt you like. Then learn three things about it: its home ground, its biggest rival, and the one moment in its history fans still bring up.
Then: watch with people
- Watch a whole match, not highlights. Highlights show the goals; a full match shows the patterns, the pressure and why a 0-0 can still be tense.
- Ask during the boring bits. The ball going out of play or a substitution is a good moment for “why did the ref do that?”
- Find where your club’s fans watch. A pub or watch party full of fans is a quick way to pick up the songs and the in-jokes.
- Don’t fake it. Most fans are happy to explain. Asking a question is how everyone learned.
Where Onside: Learn Football fits
Onside: Learn Football turns these steps into a 14-day course of three-minute lessons (how a match works, offside, positions, formations, fouls and VAR, tactics, the league pyramid, the football year, picking and learning your club), plus Ask Onside, an on-device AI for “wait, what just happened?” questions. Free to download for iPhone and iPad (iOS 17 or later). Free: the first 4 lessons of the 14-day course, the basics of all five pillars, and a few Ask Onside questions. Onside Pro is $4.99 a month or $24.99 a year (US prices). It is an explainer, not an official source; for the exact wording of a rule, use the IFAB’s free Laws of the Game app.
Sources
- IFAB Laws of the Game, Law 3: The Players
- IFAB Laws of the Game, Law 7: The Duration of the Match
- IFAB Laws of the Game, Law 11: Offside
- Premier League: 2025/26 relegation FAQ (tiebreakers and relegation)
- Laws of the Game (IFAB), US App Store, checked Nov 8, 2026
- Onside: Learn Football, US App Store, checked Nov 8, 2026