Thinking Through Science Student Log

Thinking Through Science: A Comprehensive Prehuman History is secular and research-based. TTS begins when Earth began and ends right before humans. TTS uses the geological timescale to thematically teach the fundamentals of the major sciences of botany, biology, geology, and climatology. 

The TTS Student Log is where students demonstrate their understanding of each reading assignment. It also includes a tree of life and two cladograms for students to complete throughout the course. 
 
The spines of the curriculum are two important reference sources (sold separately): Prehistoric Life and Natural History, both by DK.