Pi Lambda Theta is one of the nation’s most prestigious education honor societies, serving to recognize outstanding preservice and practicing educators. Pi Lambda Theta is one of the nation’s most prestigious education honor societies, serving to reco Pi Lambda Theta’s mission is to honor outstanding educators and inspire their leadership on critical education issues.To accomplish that mission, PLT supports the pursuit of National BoardCertification, advocates the use of NSDC standards-aligned professionallearning, and is responsible for the Project Excellence free online database of awards for educators.