Jungle Edge Biodiversity Quadrat

A square frame, thrown randomly, everything inside it counted. Repeated ten times.

Randomness is the concept that needs care. Children place the quadrat where the interesting things are unless you stop them, and the sheet includes a genuinely random method. The comparison between chosen and random placement is worth running once, deliberately, because the difference in results is large and instructive.

The page has the quadrat method, ten recording grids, and a diversity calculation. It also has the note that ten is a minimum and twenty is better, which is honest and which classes usually manage if the site is close.