Opening your garden…
Try “fractions”, “quadratic” or “II.5”, or pick a world.
Pick the first unit that feels new. Units before it start as inferred leaves (dashed), and now and then you'll get one question from them to check. Not sure? Start at the beginning.
Proven: step d planted and still watered. Planted: an easier step is planted. Thirsty: due for watering. Withered: dried out and waiting for an Intervention. Inferred: placed past it, not checked yet.