Teachers’ Knowledge of Effective Teacher-Child Interactions is a 14-item scale that tests a teacher’s understanding of and knowledge about interactions that lead to positive development. The scale consists of multiple-choice items requiring a response to a classroom scenario. Correct answers are based on effective interactions using the CLASS framework for defining (Hamre & Pianta, 2007) and measuring (Pianta et al., 2007) high-quality interactions. (author abstract)