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- Addition and subtraction intro - Learn the basics of adding and subtracting.
- What is addition? What is subtraction? - Intro to addition
- What is addition? What is subtraction? - Intro to subtraction
- Put together, take apart - Add and subtract: pieces of fruit
- Making small numbers - Making 5
- Making 10 - Getting to 10 by filling boxes
- Making 10 - Adding to 10
- Addition and subtraction within 10 - Relating addition and subtraction
- Addition and subtraction within 10 - Addition and subtraction within 10
- Addition and subtraction word problems - Addition word problems within 10
- Addition and subtraction word problems - Subtraction word problems within 10

- Addition and subtraction within 100 - Learn to add and subtract two-digit numbers within 100.
- Adding 1s and 10s - Adding 1 vs. adding 10
- Adding 1s and 10s - Understanding place value when adding tens
- Adding 1s and 10s - Understanding place value when adding ones
- Subtracting 1s and 10s - Subtracting 1 vs. subtracting 10
- Subtracting 1s and 10s - Subtracting 1s using place value
- Subtracting 1s and 10s - Subtracting 10s using place value
- Intro to addition with 2-digit numbers - Adding 2-digit numbers without regrouping 1
- Intro to addition with 2-digit numbers - Adding 2-digit numbers without regrouping 2
- Intro to addition with 2-digit numbers - Breaking apart 2-digit addition problems
- Intro to addition with 2-digit numbers - Regrouping to add 1-digit number
- Intro to addition with 2-digit numbers -Adding by making a group of 10
- Intro to subtraction with 2-digit numbers - Subtracting 2-digit numbers without regrouping 1
- Intro to subtraction with 2-digit numbers - Adding 2-digit numbers without regrouping 2
- Intro to subtraction with 2-digit numbers - Adding 2-Breaking apart 2-digit addition problems
- Intro to subtraction with 2-digit numbers - Adding 2 - Regrouping to add 1-digit number
- Intro to subtraction with 2-digit numbers - Adding 2 - Adding by making a group of 10
- Strategies for adding and subtracting within 100 - Adding 53+17 by making a group of 10
- Strategies for adding and subtracting within 100 - Adding by making a group of 10
- Strategies for adding and subtracting within 100 - Strategies for adding 2-digit numbers
- Strategies for adding and subtracting within 100 - Addition and subtraction with number lines
- Addition within 100 - Adding 2-digit numbers without regrouping 2
- Addition within 100 - Adding with regrouping
- Subtraction within 100 - Subtracting 2-digit numbers without regrouping 1
- Subtraction within 100 - Subtracting with regrouping (borrowing)
- Word problems within 100 - Adding and subtracting on number line word problems
- Word problems within 100 - Subtraction word problem: tennis balls
- Word problems within 100 - Addition word problem: horses
- Word problems within 100 - Subtraction word problem: snow
- Word problems within 100 -Subtraction word problem: crayons
- Word problems with "more" and "fewer" (within 100) - Subtraction word problem: basketball
- Word problems with "more" and "fewer" (within 100) - Addition word problem: spinner
- Word problems with "more" and "fewer" (within 100) - Addition word problem: starfish
- Word problems with "more" and "fewer" (within 100) - Addition word problem: spots
- Skip-counting - Skip-counting by 5s
- Skip-counting - Counting by 10s
- Skip-counting - Skip-counting by 100s
- Addition and subtraction missing value problems - Missing numbers in addition and subtraction

- Addition and subtraction within 1000 - Learn to add and subtract two- and three-digit numbers within 1000.
- Adding 1s, 10s, and 100s - Adding 10 or 100
- Adding 1s, 10s, and 100s - Adding 1s, 10s, and 100s
- Adding 1s, 10s, and 100s - Adding 3-digit numbers (no regrouping)
- Subtracting 1s, 10s, and 100s - Subtracting 1, 10, or 100
- Subtracting 1s, 10s, and 100s - Subtracting 1s, 10s, and 100s
- Subtracting 1s, 10s, and 100s - Subtracting 3-digit numbers (no regrouping)
- Strategies for adding 2- and 3-digit numbers - Breaking apart 3-digit addition problems
- Strategies for adding 2- and 3-digit numbers - Solving 3-digit addition in your head
- Strategies for adding 2- and 3-digit numbers - Addition using groups of 10 and 100
- Strategies for adding 2- and 3-digit numbers - Adding and subtracting on number line 2

- Addition and subtraction within 20 - Learn to add and subtract numbers that are 20 or less.
- Addition within 20 - Adding 7 + 6
- Addition within 20 - Adding 8 + 7
- Addition within 20 - Adding 5 + 3 + 6
- Subtraction within 20 - Subtracting 14 - 6
- Equal sign - Equal sign
- Word problems within 20 - Addition and subtraction word problems: superheroes
- Word problems within 20 - Addition and subtraction word problems: gorillas
- Word problems with "more" and "fewer" - Comparison word problems: marbles
- Word problems with "more" and "fewer" - Comparison word problems: roly-polies
- Repeated addition - Repeated addition: haircuts

- Counting - Learn how to count. Say how many objects you see.
- Counting with small numbers
- Counting small numbers - Counting in order
- Numbers 0 to 120 - Number grid
- Numbers 0 to 120 - Missing numbers between 0 and 120
- Counting objects - Counting in pictures
- Counting objects - Counting objects 1
- Counting objects - Counting objects 2
- Comparing small numbers - Comparing numbers of objects
- Comparing small numbers - Comparing numbers on the number line
- Comparing small numbers - Counting by category

- Geometry - Learn about triangles, circles, rectangles, and other shapes.
- Basic shapes - Cousin Fal's shape collection
- Basic shapes - Recognizing shapes
- Properties of shapes - Cousin Fal's shape collection
- Properties of shapes -Recognizing shapes
- Composing shapes - Composing shapes
- Fractions of shapes - Halves and fourths
- Fractions of shapes - Filling rectangles with squares
- Fractions of shapes -Equal parts of circles and rectangles

- Measurement and data - Learn how to measure length, tell time, count money, and make graphs.
- Length and size - Ordering by length
- Measuring length - Measuring lengths 2
- Measuring length - Measuring lengths with different units
- Comparing and estimating length - Comparing lengths
- Comparing and estimating length - Estimating lengths
- Length word problems - Length word problems
- Length word problems - Measuring length: golden statue
- Bar graphs - Reading bar graphs: dog bones
- Bar graphs - Reading bar graphs: bikes
- Line plots - Intro to line plots
- Line plots - Making picture graphs and line plots
- Time - Telling time (labeled clock)
- Time - Telling time (unlabeled clock)
- Money - Counting dollars
- Money - Counting American coins

- Place value (tens and hundreds) - Learn about tens and hundreds. Compare 2-digit and 3-digit numbers.