Texas Education Agency
Texas Gateway: Survival of a Species
Given scenarios, illustrations or descriptions, the student will describe how long-term survival of species is dependent on changing resource bases that are limited.
Illustrative Mathematics
Illustrative Mathematics: 8.ee Extending Definitions of Exponents, Variation 1
In this task, 8th graders examine the changes in the size of a population of bacteria during an experiment studying its growth. They learn how to talk about negative integer exponents and negative time. Aligns with 8.EE.A.1.