Gold star (score)
From Tardis Wiki, the free Doctor Who reference
The Thirteenth Doctor awarded a gold star to Ryan Sinclair, but quickly remembered that she forgot about points. (TV: Demons of the Punjab) She once again awarded gold stars to the new "crew" of an abandoned spaceship. (TV: Praxeus)
The Fourth Doctor once told a Genesis III computer that it was worthy of two gold stars. (PROSE: Inter-Galactic Cat)