Grade One math lessons

Decomposing Numbers within 10

L1 · 2:22

Addition within 10

L2 · 2:32

Subtraction within 10

L3 · 2:54

Making Ten to Add

L4 · 4:38

Commutative Property of Addition

L5 · 5:38

Relationship Between Subtraction and Addition

L6 · 4:39

The Meaning of the Equal Sign

L7 · 3:50

Fluency in Addition and Subtraction

L8 · 3:16

Counting to 120

L9 · 3:07

Tens and Ones

L10 · 2:18

Comparing Two-Digit Numbers

L11 · 3:18

Addition within 100

L12 · 4:49

Mental Math: 10 More / 10 Less

L13 · 3:07

Subtracting Multiples of 10 within 100

L14 · 3:50

Length Comparison and Measurement

L15 · 1:23

Telling Time: On the Hour and Half Hour

L16 · 0:39

Data Charts: Sorting and Counting

L17 · 3:32

Shape Attributes: Defining or Non-Defining

L18 · 2:52

Composing 2D Shapes

L19 · 2:14

Equal Parts: Halves and Fourths

L20 · 2:11