🚣 River Crossing

Ferry everyone across the river — but never leave the wrong pair alone together!

Playing here doesn't save progress. Open it in TernQuest to keep stars and coins, or make a free account.

What does River Crossing teach?

River Crossing is a math game for 2nd grade – 5th grade that practises constraint logic. Like every TernQuest game it is tied to a skill on the curriculum map (state standards — Common Core, NGSS, CSTA and History–Social Science, PK–5), and Pip the tern gives hints, never answers.

Is it free?

Yes. River Crossing is playable in the browser with no ads and no signup. A free account (one child) saves progress and stars.