Sarah Greenstreet focused on improving the reliability and clarity of the lsst/tutorial-notebooks repository by addressing a critical bug in the SSSource-related Jupyter notebooks. She corrected notebook header numbering and refined a SQL join condition to ensure that queries accurately reflected the underlying data model. Using her skills in data analysis, database querying, and documentation, Sarah updated the 201_8_SSSource_table.ipynb notebook to align with the corrected schema and query results. These changes enhanced the reproducibility and accuracy of tutorial analyses, reducing the risk of misinterpretation. Her work maintained clear traceability through well-documented commits and careful change management practices.