The current study examined the feasibility of adapting an existing measure to create a brief mattering measure suitable for use with adolescents. We then evaluated this brief measure by testing the hypothesis that mattering in adolescents is associated broadly with positive achievement outcomes and associated motivational orientations and behavioral tendencies. A sample of 206 high school students completed a slightly modified version of the Mattering Index, the Pattern of Adaptive Learning Scales, and a measure of executive function. School grades, school risk behavior, and social risk behavior were also assessed. Participants also completed measures of hope and loneliness. Psychometric analyses resulted in two brief four-item mattering subscales tapping (a) general mattering and (b) mattering by giving value to others. Correlational and regression analyses established that both mattering factors were associated with a positive academic orientation and higher grades. Mattering was also associated with less risk behavior, lower levels of loneliness, and higher levels of hope. Gender differences were found in terms of levels of mattering and the correlates of mattering. The findings are discussed in terms of how a focus on the promotion of mattering should contribute to an adaptive academic orientation, enhanced self-regulation, and the capacity to be adaptable and resilient.