Khan Academy

Subtract within 20 using a number line. (K-A)

Subtract within 20 using place value blocks. (K-A)

Subtract within 20 using ten frames (K-A)

Subtracting 14 – 6 (K-A)

Adding within 20 using place value blocks (K-A)

Adding within 20 using ten frames (K-A)

Addition and subtraction word problems: gorillas (K-A)

Addition and subtraction word problems: superheroes (K-A)

Subtract within 20 using a number line (K-A)

Subtract within 20 using place value blocks (K-A)

Repeated addition: haircuts (K-A)

Adding 1 vs. adding 10 (K-A)

Adding 1s and 10s guided practice (K-A)

Understanding place value when adding ones (K-A)

Understanding place value when adding tens (K-A)

Subtracting 1 vs. subtracting 10 (K-A)

Subtracting 10s using place value (K-A)

Subtracting 1s using place value (K-A)

Subtracting 2-digit numbers without regrouping 1- video (K-A)

Subtracting a 1-digit number with regrouping (K-A)

Subtracting two-digit numbers without regrouping (example 2) (K-A)

Adding 2-digit numbers without regrouping 1 (K-A)

Adding 2-digit numbers without regrouping 2- video (K-A)

Adding by making a group of 10- (video) (K-A)

Breaking apart 2-digit addition problems (K-A)