Flourish of approval
Dutch written symbol
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A flourish of approval (goedkeuringskrul) or curl (krul) is a Dutch symbol, analogous to a check mark. It indicates approval, and is mostly used to grade schoolwork.

History
The krul first appeared in the early 19th century together with the rising bureaucracy in the Netherlands.[1]
Usage
The symbol is rarely used outside of the Netherlands apart from the Dutch Caribbean islands and former Dutch colonies such as Indonesia, South Africa, Suriname.[citation needed]
Despite its wide usage throughout the country and its former colonies, there is no Unicode symbol for it.[2][unreliable source][3][better source needed] The symbol is also not available natively in TeX, but can be created in various ways.[4][unreliable source]