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- Numbers, written by Joseph Midthun ; illustrated by Samuel Hiti
- Division, written by Joseph Midthun ; illustrated by Samuel Hiti
- Animal behavior, written by Joseph Midthun ; illustrated by Samuel Hiti
- Gravity, written by Joseph Midthun ; illustrated by Samuel Hiti
- Cells to organ systems
- Multiplication, written by Joseph Midthun ; illustrated by Samuel Hiti
- The nervous system, Joseph Midthun, Samuel Hiti
- Animal structure and classification, written by Joseph Midthun ; illustrated by Samuel Hiti
- Sound, written by Joseph Midthun ; illustrated by Samuel Hiti
- Division, Joseph Midthun, Samuel Hiti
- Matter and its properties, written by Joseph Midthun ; illustrated by Samuel Hiti
- Animal life cycles, written by Joseph Midthun ; illustrated by Samuel Hiti
- Fighting Covid-19 and other illnesses, written Joseph Midthun ; illustrated by Samuel Hiti
- Plant and animal adaptations, written by Joseph Midthun ; illustrated by Samuel Hiti
- The endocrine and reproductive systems, written by Joseph Midthun ; illustrated by Samuel Hiti
- Plant structure and classification, written by Joseph Midthun ; illustrated by Samuel Hiti
- The cell cycle, written by Joseph Midthun ; illustrated by Samuel Hiti
- Energy, written by Joseph Midthun ; illustrated by Samuel Hiti
- The skeletal and muscular systems, Joseph Midthun, Samuel Hiti
- Fractions, written by Joseph Midthun ; illustrated by Samuel Hiti
- Traits and heredity, written by Joseph Midthun ; illustrated by Samuel Hiti
- Force and motion, written by Joseph Midthun ; illustrated by Samuel Hiti
- Heat, written by Joseph Midthun ; illustrated by Samuel Hiti
- Light, written by Joseph Midthun ; illustrated by Samuel Hiti
- Fighting sickness, Joseph Midthun, Samuel Hiti
- Addition, Joseph Midthun, Samuel Hiti
- The skeletal and muscular systems, written by Joseph Midthun ; illustrated by Samuel Hiti
- Numbers, Joseph Midthun, Samuel Hiti
- Magnetism, written by Joseph Midthun ; illustrated by Samuel Hiti
- The circulatory system, written by Joseph Midthun ; illustrated by Samuel Hiti
- Subtraction, by Joseph Midthun, Samuel Hiti
- The digestive and urinary systems, Joseph Midthun, Samuel Hiti
- Addition, written by Joseph Midthun ; illustrated by Samuel Hiti
- Electricity, written by Joseph Midthun ; illustrated by Samuel Hiti
- The nervous system, written by Joseph Midthun ; illustrated by Samuel Hiti
- Matter and how it changes, written by Joseph Midthun ; illustrated by Samuel Hiti
- Subtraction, written by Joseph Midthun ; illustrated by Samuel Hiti
- Plant life cycles, written by Joseph Midthun ; illustrated by Samuel Hiti
- Fractions, Joseph Midthun, Samuel Hiti
- Multiplication, Joseph Midthun, Samuel Hiti
- The endocrine and reproductive systems
- Cells to organ systems, written by Joseph Midthun ; illustrated by Samuel Hiti
- The respiratory system, written by Joseph Midthun ; illustrated by Samuel Hiti
- The digestive and urinary systems, written by Joseph Midthun ; illustrated by Samuel Hiti
- The respiratory system, Joseph Midthun, Samuel Hiti
- The circulatory system