The Center for Strengthening the Teaching Profession (CSTP) commissioned Inverness Research to undertake a study about what it takes for elementary teachers to strengthen their teaching of science. This report documents the perspectives and experiences of a selected pool of K-5 teachers, representing 67 districts, who are committed to improving their teaching and, in particular, are dedicated to get better at teaching science. It explains what motivates these teachers, what resources they need, what experiences they have and processes they undergo, and what barriers they encounter and surmount in their efforts to improve their science teaching. The report includes findings and recommendations that will help policy-makers and reform leaders support ongoing improvement of elementary science in Washington. Two appendices are included: (1) Survey Form; and (2) Protocol for Individual Interviews. (Contains 1 table and 11 footnotes.) ["Investing in the Improvement of Elementary Science in Washington State: Findings and Implications from a Study of K-5 Teachers Striving to Strengthen Their Science Teaching" was written with Judy Hirabayashi, Laurie Lopez, Heather Mitchell, Mary Regan. This report was sponsored by and conducted in collaboration with the Center for Strengthening the Teaching Profession.]