As STEM Assessment Specialist at Envision Learning Partners (ELP), Jim plays a key role on the ELP STEM team in his work with teachers and school leaders to improve math instruction, connect assessment and learning, and build educator capacity to support students’ language development in the process. Jim came to ELP from Understanding Language/Stanford Center for Assessment, Learning, and Equity (UL/SCALE), which he joined in 2016 after working for two years as a teacher collaborator on SCALE’s PBL curriculum project Learning Through Performance Middle School Mathematics. He taught 6th grade mathematics at East Bay Innovation Academy (Oakland, CA), which uses a combination of blended learning and project based learning. Before that, he taught at public schools in Philadelphia and in Ghana. Jim’s experience as a middle school math teacher brings a classroom lens to his work on performance task design, rubric design, analysis of student work, and professional development. Jim’s curriculum development experience includes building language development opportunities into math and science curricula, including the Illustrative Mathematics OUR curriculum, and working with the English Learner Success Forum to train curriculum developers in designing materials that attend to both mathematical and language development. His professional development experience includes working with the CALLI (California Language and Learning Innovation) Collaborative project. At ELP, he continues to facilitate professional development empowering math teachers to write high-quality performance assessments. He is also a member of the research team for the Measures of Deeper Learning project, supporting work with schools engaged in the assessment of social-emotional learning competencies.