1st Grade Standards Practice If logged in, you will see your mastery percentage next to each skill. You can create a free child account here. Number and Operations in Base Ten Extend the counting sequence Count to 120 (F1-C.120) Understanding Place Value Show a number using 10 bars and 1 bars (F1-NBT.1) Use place value understanding and properties of operations to add and subtract Add within 100 (F1-NBT.2) Find 10 more or less (F1-NBT.3) Subtract multiples of 10 (F1-NBT.4) Measurement and Data Represent and interpret data Organize, Represent, and Interpret Data (F1-MD.1) Express the Length of an Object as a Whole Number of Length Units (F1-MD.2) Geometry Reason with shapes and their attributes Distinguish between Defining and Non-Defining Attributes (F1-G.1) Compose two-dimensional shapes Compose Two-Dimensional Shapes (F1-G.3) Operations and Algebraic Thinking Add and subtract within 20 Efficient Addition & Subtraction Within 20 (F1-OA.1)