- How do rainbows form?, by Rebecca Pettiford
- Bridges, by Rebecca Pettiford
- Different abilities, by Rebecca Pettiford
- Lantern Festival, by Rebecca Pettiford
- Franklin D. Roosevelt, by Rebecca Pettiford
- Valentine's day, by Rebecca Pettiford
- Ice storms, by Rebecca Pettiford
- Wildfires, by Rebecca Pettiford
- Thomas Jefferson, by Rebecca Pettiford
- Sinkholes, by Rebecca Pettiford
- Skyscrapers, by Rebecca Pettiford
- Mardi Gras, by Rebecca Pettiford
- Pettiford, Rebecca, Geology genius
- Droughts, by Rebecca Pettiford
- Thanksgiving, by Rebecca Pettiford
- Arctic food chains, by Rebecca Pettiford
- Pettiford, Rebecca, Amazing structures
- Different appearances, by Rebecca Pettiford
- Kevin Durant, by Rebecca Pettiford
- Collared lemmings, by Rebecca Pettiford
- Pettiford, Rebecca, Festivals
- Harp seals, by Rebecca Pettiford
- Why is the sky blue?, by Rebecca Pettiford
- Barack Obama, by Rebecca Pettiford
- Arctic foxes, by Rebecca Pettiford
- Easter, by Rebecca Pettiford
- Dams, by Rebecca Pettiford
- Diwali, by Rebecca Pettiford
- Stadiums, by Rebecca Pettiford
- Minerals, by Rebecca Pettiford
- Gemstones, by Rebecca Pettiford
- Different families, by Rebecca Pettiford
- Outback food chains, by Rebecca Pettiford
- Recycling, by Rebecca Pettiford
- Puffer fish, by Rebecca Pettiford
- Halloween, by Rebecca Pettiford
- Dwight D. Eisenhower, by Rebecca Pettiford
- Hybrid and electric cars, by Rebecca Pettiford
- Green buildings, by Rebecca Pettiford
- Day of the dead, by Rebecca Pettiford
- Wind power, by Rebecca Pettiford
- Jimmy Carter, by Rebecca Pettiford
- St. Patrick's Day, by Rebecca Pettiford
- Veterans day, by Rebecca Pettiford
- Christmas, by Rebecca Pettiford
- Pettiford, Rebecca, Celebrating differences
- George Washington, by Rebecca Pettiford
- Chinese New Year, by Rebecca Pettiford
- Tunnels, by Rebecca Pettiford
- Roller Coasters, by Rebecca Pettiford