Evidence-based education (EBE) is the principle that education practices should be based on the best available scientific evidence, with randomised trials as the gold standard of evidence, rather than tradition, personal judgement, or other influences.[1] Evidence-based education is related to evidence-based teaching,[2][3][4] evidence-based learning,[5] and school effectiveness research.[6][7] Th

1880 cartoon about land speculation in Canada's Northwest Territories. A settler ("R.W.P." ?) moves to the Northwest Territories, only to find multiple signs telling him that there is no land available for him: "Reserved for Friends of the Governm't", "This Land Sold to Speculators", "Gov't Land Policy: Keep Off'n The Grass", "Keep Off Grass", "This Lot Not for Sale", "Go West", "This Land is Sold

The only symmetrical solution to the eight queens puzzle (up to rotation and reflection) The eight queens puzzle is the problem of placing eight chess queens on an 8×8 chessboard so that no two queens threaten each other; thus, a solution requires that no two queens share the same row, column, or diagonal. There are 92 solutions. The problem was first posed in the mid-19th century. In the modern e

Elysia chlorotica (common name the eastern emerald elysia) is a small-to-medium-sized species of green sea slug, a marine opisthobranch gastropod mollusc. This sea slug superficially resembles a nudibranch, yet it does not belong to that clade. Instead it is a member of the clade Sacoglossa, the sap-sucking sea slugs. Some members of this group use chloroplasts from the algae they eat for photosyn