The System Effects Quiz on Capsuleers.app shows the modifiers of a system effect beacon — buffs on one side, debuffs on the other — and asks which effect it is among four of the same family. The pool covers the six wormhole effects at every class (Pulsar, Black Hole, Cataclysmic Variable, Magnetar, Red Giant, Wolf-Rayet), plus Pochven, incursion and Drifter beacons, with magnitudes read from the SDE.
Wormhole rounds offer options of the same class, so the size of the numbers doesn't give the answer away: it is the shape of the effect you have to recognise. Without an account the quiz runs in practice mode; signed in with EVE Online, your score feeds the public leaderboard. Fan-made, not affiliated with Fenris Creations.