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MERLOT II


    

Peer Review


Stickleback Evolution

by
 

Ratings

Overall Rating:

4.75 stars
Content Quality: 4.75 stars
Effectiveness: 4.75 stars
Ease of Use: 5 stars
Reviewed: Mar 30, 2014 by Biology Editorial Board
Overview: This resource is a topic (Stickleback Evolution) from the popular Learn Genetics website hosted by University of Utah. The topic of stickleback evolution is clearly depicted through narration, animation, text, and links to the (Howard Hughes Medical Institute (HHMI) Holiday lecture series on the topic of evolution. Students are presented with a modern-day evolutionary timeline showing how an advantageous trait quickly became established in a stickleback population.
Learning Goals: None stated. The general goal of the site is not to present stickleback evolution, but to provide an example of ongoing evolution.
Target Student Population: High School, College General Ed, College Lower Division, College Upper Division.
Prerequisite Knowledge or Skills: Basic vocabulary related to evolutionary biology.
Type of Material: Narrated animation, presentation, tutorial.
Recommended Uses:
  • In-class lecture and lab supplement
  • Homework
Technical Requirements: Web browser. Some plugins (Flash) may be needed for the animation.

Evaluation and Observation

Content Quality

Rating: 4.75 stars
Strengths:
  • The information is accurate and simplified enough for most students
  • Links are provided to more detailed information
  • The key point (evolution occurs today) is made explicitly
  • The link to a list of references enhances the quality of the learning experience
Concerns:
  • The key point (evolution occurs today) is not discussed
  • Calling the stickleback study a "rare" example of evolution may give students the impression that evolution is rare today rather than what I assume is the intended meaning (that good simple easy to understand examples are rare)
  • No explanation of the Ectodysplasin gene is given, and to introduce a technical term in a highly simplified lesson like this, is disconcerting

Potential Effectiveness as a Teaching Tool

Rating: 4.75 stars
Strengths:
  • For students who do not understand basic evolution, this resource will be highly effective in presenting a real life example
  • The links to the HHMI lectures and the Bell lab website allow more advanced students to go further
  • The "real time" graph below the animation helps make sense of the topic
  • The material is partly interactive and hence, keeps users actively involved with the learning experience
  • Material builds upon knowledge in multiple ways depending on how users navigate through the site
Concerns:
  • The animation is engaging, but it is not clear exactly what is going on with the fish shown in the animation; are the different sizes different life stages or different forms of the same species?
  • The page may be a bit oversimplified insofar as it has no discussion connecting the rise of an advantageous trait (low armor) with natural selection), but rather describes this as an example of evolution; students might wonder how we know this is selection rather than genetic drift

Ease of Use for Both Students and Faculty

Rating: 5 stars
Strengths:
  • The animation and links worked as intended on Mac (Firefox, Safari) and PC (Firefox)
  • The animation has labels on all the buttons explaining what they do, so even the most computer averse student could use this resource successfully
  • Information on permission to use this material is provided
  • The animation is ADA compliant in that it can be viewed with captions for deaf people or listened to with narration for the blind
Concerns:
  • None

Other Issues and Comments: No additional contents at this time.