The past 4 years, I've been district hired math coach for the largest school system in NC. I've already decomposed each math standard in the Common Core Math for Grade 3 into kid-friendly language "I can" learning targets complete with "I will" criteria for success. They are organized by each domain and separated by clusters.
These aren't your ordinary "I can" statements you see everywhere because this document will actually help you teach the standard to your students. These are unique because the each standard is built with SIOP in mind and the criteria is research based. Each set of criteria is embedded with the math practice standards so students are learning the content through the practices in order to be more proficient mathematicians in grade 3!