1. Characterizing the Nature of Students' Feature Noticing-and-using With Respect to Mathematical Symbols Across Different Levels of Algebra Exposure Open Access Author: Sullivan, Patrick Title: Characterizing the Nature of Students' Feature Noticing-and-using With Respect to Mathematical Symbols Across Different Levels of Algebra Exposure Graduate Program: Curriculum and Instruction Keywords: NoticingFeaturesAlgebraAlgebraic SymbolsSymbolic RepresentationsStudent Learning File: Download Sullivan_Dissertation_14_130328.pdf Committee Members: Mary Kathleen Heid, Dissertation Advisor/Co-AdvisorMary Kathleen Heid, Committee Chair/Co-ChairGlendon Wilbur Blume, Committee MemberRose Mary Zbiek, Committee MemberMark Levi, Committee Member