MS-ETS1-1 Define the criteria and constraints of a design problem with sufficient precision to ensure a successful solution, taking into account relevant scientific principles and potential impacts on people and the natural environment that may limit possible solutions
Clarification Statement: none
Assessment Boundary: none
This resource is explicitly designed to build towards this performance expectation.
Comments about Including the Performance Expectation
Students are engaging in defining and delimiting engineering problems as they research potential solutions to the problem of antibiotic resistance and develop a list of criteria and constraints that should be considered when trying to reduce or prevent antibiotic resistance in hospitals and nursing homes.
MS-LS4-6 Use mathematical representations to support explanations of how natural selection may lead to increases and decreases of specific traits in populations over time.
Clarification Statement: Emphasis is on using mathematical models, probability statements, and proportional reasoning to support explanations of trends in changes to populations over time.
Assessment Boundary: Assessment does not include Hardy Weinberg calculations.
This resource is explicitly designed to build towards this performance expectation.
Comments about Including the Performance Expectation
The results of an experiment for the frequency of traits in a bacterial population growing in a petri dish over time are presented in the forms of a data table and in graphs and students use these mathematical representations to support their explanations about how natural selection leads to increases and decreases of specific traits in populations over time.
MS-LS4-4 Construct an explanation based on evidence that describes how genetic variations of traits in a population increase some individuals’ probability of surviving and reproducing in a specific environment.
Clarification Statement: Emphasis is on using simple probability statements and proportional reasoning to construct explanations.
Assessment Boundary: none
This resource is explicitly designed to build towards this performance expectation.
Comments about Including the Performance Expectation
Students are specifically asked to construct an explanation based on evidence about how the genetic trait of antibiotic resistance increased in the population of bacteria since they survived and reproduced more than those that were killed by antibiotics. They read about antibiotic resistance and consider samples of bacteria that help them survive in various environments. The results of an experiment for the frequency of traits in a bacterial population growing in a petri dish over time are presented in the forms of a data table and in graphs and students use these mathematical representations to support their explanations about how natural selection leads to increases and decreases of specific traits in populations over time. Many tips about how to implement this assessment are included. There is a detailed explanation of how each standard is addressed in the sequence of activities and the authors describe how to connect the math, language arts and science aspects. Evidence Statements for each task are included and they describe what students should know and be able to do in order to be able to satisfy each Performance Expectation. They provide a way to assess specific skills and practices as well as student’s knowledge of disciplinary core ideas and crosscutting concepts.