- Solar PowerChristine Petersen
- The Atlantic OceanChristine Petersen
- Alternative EnergyChristine Petersen
- Rosie The RiveterChristine Petersen
- The blacksmithChristine Petersen
- Wind PowerChristine Petersen
- Outrageous oresChristine Petersen
- CubaChristine Petersen
- TurquoiseChristine Petersen
- South DakotaChristine Petersen
- Fantastic fossilsChristine Petersen
- DiamondsChristine Petersen
- Does Everyone Have ADHD?Christine Petersen
- InvertebratesChristine Petersen
- SilverChristine Petersen
- The Pacific OceanDavid Petersen, Christine Petersen
- Dangerous DrugsJeff Burlingame, Christine Petersen et al.
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- PearlsChristine Petersen
- Groovy gemsChristine Petersen
