Teacher presentation materials. Unit: 1.1 Adding, Subtracting, and Working with Data (Grade 1). 1.1 Adding, Subtracting, and Working with Data Unit Goals Students add and subtract within 10, and represent and interpret categorical data. Section A Goals Build toward fluency by adding and subtracting within 10 in a way that makes sense to them. Section B Goals Organize and represent data. Section C Goals Interpret data representations to ask and answer questions. Read More Lessons Resources Assessments Practice Glossary Lessons Section A: Add and Subtract within 10 1 Count and Add 2 Explore Expressions and Sums 3 Add 1 or 2 4 More Work with 1 and 2 5 Explore Addition and Subtraction PLC Ac