Four rounds of card sorting, built from the exact characteristics that have appeared on released MAAP Biology forms.
Round 1 — The 2026 eight-card table (even 4-and-4 split)
Round 2 — The 2018–19 chart (uneven 3-and-2 split)
Round 3 — Valid criterion or not unique to life?
Round 4 — Mixed wording, including the negated forms
Two ways to move a card: drag it into a column, or tap the card and then tap the column.
On a Chromebook you can also press Tab to a card, Enter to pick it up, then 1 or 2
to drop it. Tap a placed card to send it back.