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# Grade 1 | Mathematics (Essential Elements)

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Note: The Iowa Core Essential Elements are intended only for students with significant cognitive disabilities and who participate in alternate assessments.

## Operations and Algebraic Thinking (EE.1.OA)

### Represent and solve problems involving addition and subtraction. (EE.1.OA.A)

1. (EE.1.OA.A.1)
1. Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), or acting out situations. (EE.1.OA.A.1.a)
2. Recognize two groups that have the same or equal quantity. (EE.1.OA.A.1.b)
2. Use “putting together” to solve problems with two sets. (EE.1.OA.A.2)

### Understand and apply properties of operations and the relationship between addition and subtraction. (EE.1.OA.B)

1. Not applicable. See EE.6.EE.3 and EE.N-CN.2. (EE.1.OA.B.3)
2. Not applicable. See EE.1.NBT.4 and EE.1.NBT.6. (EE.1.OA.B.4)

### Add and subtract within 20. (EE.1.OA.C)

1. (EE.1.OA.C.5)
1. Use manipulatives or visual representations to indicate the number that results when adding one more. (EE.1.OA.C.5.a)
2. Apply knowledge of “one less” to subtract one from a number. (EE.1.OA.C.5.b)
2. Not applicable. See EE.3.OA.4. (EE.1.OA.C.6)

### Work with addition and subtraction equations. (EE.1.OA.D)

1. Not applicable. See EE.1.OA.1.b and EE.2.NBT.5.a. (EE.1.OA.D.7)
2. Not applicable. See EE.3.OA.4. (EE.1.OA.D.8)

## Number and Operations in Base Ten (EE.1.NBT)

### Extend the counting sequence. (EE.1.NBT.A)

1. (EE.1.NBT.A.1)
1. Count by ones to 30. (EE.1.NBT.A.1.a)
2. Count as many as 10 objects and represent the quantity with the corresponding numeral. (EE.1.NBT.A.1.b)

### Understand place value. (EE.1.NBT.B)

1. Create sets of 10. (EE.1.NBT.B.2)
2. Compare two groups of 10 or fewer items when the number of items in each group is similar. (EE.1.NBT.B.3)

### Use place value understanding and properties of operations to add and subtract. (EE.1.NBT.C)

1. Compose numbers less than or equal to five in more than one way. (EE.1.NBT.C.4)
2. Not applicable. See EE.1.OA.5.a and EE.1.OA.5.b. (EE.1.NBT.C.5)
3. Decompose numbers less than or equal to five in more than one way. (EE.1.NBT.C.6)

## Measurement and Data (EE.1.MD)

### Measure lengths indirectly and by iterating length units. (EE.1.MD.A)

1. Compare lengths to identify which is longer/shorter, taller/shorter. (EE.1.MD.A.1)
2. Compare lengths to identify which is longer/shorter, taller/shorter. (EE.1.MD.A.2)

### Tell and write time. (EE.1.MD.B)

1. (EE.1.MD.B.3)
1. Demonstrate an understanding of the terms tomorrow, yesterday, and today. (EE.1.MD.B.3.a)
2. Demonstrate an understanding of the terms morning, afternoon, day, and night. (EE.1.MD.B.3.b)
3. Identify activities that come before, next, and after. (EE.1.MD.B.3.c)
4. Demonstrate an understanding that telling time is the same every day.  (EE.1.MD.B.3.d)

### Represent and interpret data. (EE.1.MD.C)

1. Organize data into categories by sorting. (EE.1.MD.C.4)

## Geometry (EE.1.G)

### Reason with shapes and their attributes. (EE.1.G.A)

1. Identify the relative position of objects that are on, off, in, and out. (EE.1.G.A.1)
2. Sort shapes of same size and orientation (circle, square, rectangle, triangle).  (EE.1.G.A.2)
3. Put together two pieces to make a shape that relates to the whole (i.e., two semicircles to make a circle, two squares to make a rectangle). (EE.1.G.A.3)