Tasks are checked the moment a student solves them
Students see right away whether a step holds. You see, from the same view, who has done what.
Feedback arrives in the same moment
The instant a student writes an intermediate step, Origo checks it. If the step is mathematically valid, they see that. If it isn't, they know where it came apart.
The check follows the intermediate steps, not just the final answer. A student can reach the same result along a different path and have it accepted too — as long as the maths holds up.
Why immediate feedback changes learning
Practice teaches most when feedback arrives close to the moment the thinking happened. If the signal about a mistake only comes days later, the student has already forgotten what they were thinking as they wrote.
Knowing right away whether a step works keeps the student inside the solution. A misconception is corrected while it's still fresh — before it has time to settle in.
You see what the class has done
Because every solution is checked automatically, you get a collected view of the class without any separate work: who has completed today's tasks, who is mid-way, who is stuck.
You also see which tasks produced the most errors and at which step. The next lesson can start exactly where the class actually is.
The checking happens when it matters most — during the solution.