Illustrative Math

The big ideas in grade 1 include: developing understanding of addition, subtraction, and strategies for addition and subtraction within 20; developing understanding of whole-number relationships and place value, including grouping in tens and ones; developing understanding of linear measurement and measuring lengths as iterating length units; and reasoning about attributes of, and composing and decomposing geometric shapes. 

Unit 01: Adding subtracting and working with data

Students add and subtract within 10, and represent and interpret categorical data. 

Unit 02: Addition and subtraction story problems

Students solve new types of story problems within 10 using the relationship between addition and subtraction. They develop an understanding of the meaning of the equal sign and connect story problems to equations.  

Unit 03: Adding and Subtracting within 20

Students add and subtract within 20. Students apply the properties of operations and the relationship between addition and subtraction. 

Unit 04: Numbers to 99

Students develop an understanding of place value for numbers up to 99. 

Unit 05: Adding within 100

Students use place value understanding and properties of operations to add within 100. 

Unit 06: Length measurements within 120

Students measure length and count up to 120 length units. They solve addition and subtraction story problems with unknowns in all positions. 

Unit 07: Geometry and time

Students reason with shapes and their attributes, partition shapes into equal pieces, and tell time to the hour and half hour. 

Unit 08: Putting it all together

Students consolidate and solidify their understanding of various concepts and skills on major work of the grade. They also continue to work toward fluency goals of the grade.