Here is a list of science skills students learn in second grade! These skills are organized into categories, and you can move your mouse over any skill name to preview the skill. To start practicing, just click on any link. Smart Child Zone will track your score, and you will get immediate feedback as you practice!

### 1. Numbers and comparing

- Even or odd
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- Even or odd: arithmetic rules
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- Skip-counting
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- Skip-counting puzzles
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- Number sequences
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- Ordinal numbers to 100th
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- Write numbers in words
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- Roman numerals I, V, X, L, C, D, M
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- Compare numbers
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- Which number is greatest/least?
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- Comparing: with addition and subtraction
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- Multi-step inequalities
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### 2. Addition

- Add two numbers up to three digits: word problems
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- Balance addition equations: up to three digits
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- Add three numbers up to three digits each: word problems
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- Add two numbers up to four digits: word problems
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- Balance addition equations: up to four digits
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- Add three numbers up to four digits each: word problems
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### 3. Place values

- Place value models up to thousands
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- Place value names up to thousands
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- Place value names up to hundred thousands
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- Value of a digit
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- Convert to/from a number
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- Convert between place values
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- Convert from expanded form
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- Convert between standard and expanded form
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- Place value word problems
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### 4. Multiplication skill builders

- Multiply by 0
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- Multiply by 1
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- Multiply by 2
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- Multiply by 3
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- Multiply by 4
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- Multiply by 5
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- Multiply by 6
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- Multiply by 7
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- Multiply by 8
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- Multiply by 9
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- Multiply by 10
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- Multiply by 11
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### 5. Three-dimensional shapes

- Identify three-dimensional shapes
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- Count vertices, edges, and faces
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- Identify faces of three-dimensional shapes
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- Shapes of everyday objects I
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### 6. Logical reasoning

- Guess the number
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- Largest/smallest number possible
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- Age puzzles
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- Find the order
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### 7. Triangles and quadrilaterals

- Scalene, isosceles, and equilateral triangles
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- Acute, obtuse, and right triangles
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- Parallel sides in quadrilaterals
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