#### 2016

Johnson, H. L. (2016). Quantitative reasoning in mathematics education: Directions in research and practice. In R. A. Duschl & A. Bismack (Eds.), Reconceptualizing STEM education: The central role of practices (pp. 149-166). London: Routledge, Taylor & Francis. DOWNLOAD

#### 2015

**Johnson, H.**, Karunakaran, S., Fox, R., & McClintock, E. (2015). Square root of *i*: Situation 9 from the MACMTL-CPTM situations project. In M. K. Heid, P. S. Wilson, with G. W. Blume (Eds.), *Mathematical understanding for secondary teaching: A framework and classroom-based situations* (pp. 171-177). Charlotte, NC: Information Age Publishing

**Johnson, H.**, Karunakaran, S., McClintock, E., Nazarewicz, P., Jacobson, E., & Edenfield, K. (2015). Absolute value in complex plane: Situation 7 from the MACMTL-CPTM situations project. In M. K. Heid, P. S. Wilson, with G. W. Blume (Eds.), *Mathematical understanding for secondary teaching: A framework and classroom-based situations* (pp. 155-161). Charlotte, NC: Information Age Publishing

**Johnson, H.**, McClintock, E., Zbiek, R. M., Gleason, B., Broderick, S., & Wilson J. (2015). Graphing sin(2x): Situation 36 from the MACMTL-CPTM situations project. In M. In M. K. Heid, P. S. Wilson, with G. W. Blume (Eds.), *Mathematical understanding for secondary teaching: A framework and classroom-based situations* (pp. 385-389). Charlotte, NC: Information Age Publishing

**Johnson, H.**, Reed, S., McClintock, E., Jacobson, E., & Edenfield, K. (2015). The product rule for differentiation: Situation 42 from the MACMTL-CPTM situations project. In M. K. Heid, P. S. Wilson, with G. W. Blume (Eds.), *Mathematical understanding for secondary teaching: A framework and classroom-based situations* (pp. 425-431). Charlotte, NC: Information Age Publishing