3

Friction

2

Dinosaurs

3

David Livingstone

4

Deciduous Forest

3

The Sun

4

Famous Americans: George Washington

3

Mountains of the World

4

How they work? Rockets

3

Jupiter

2

Tyler the Turtle

2

Timo Goes Camping

4

Patsy and Paul at Machu Picchu in Peru

4

Jewels, Gemstones, and Birthstones

3

The Disappearing Cow

3

Nathan the Whale

4

Gateway Arch

3

Clayton Does The Unthinkable

2

Be Safe on the Road!

3

Isthmuses of the World

3

The Moon

2

Maddy Madcap

4

Chip's Tips on Namibia

4

Things to See in New York City

4

Hoover Dam

3

Eid al-Fitr

4

Polar

4

Grandpa's Guide Dog

4

Maddy's Vermont Diary

3

Lee-Lee and La-La Welcome Little Lou-Li!

4

Chip's Tips on Equatorial Guinea