You will write up all the work from your dichotomous key-making, testing, and refining as an official work sample following the State of Oregon's rubric for engineering design, which Mr. Herlands has provided you with a copy of.
To achieve a passing score, you must receive a score of 4 or higher in each of the 4 categories of the rubric. To do this, your work sample should be written using scientific language, and it should answer each of the topics below with enough description to show what you have done and what you have learned. You may use all available resources when writing up your work sample—all your work before and during the activity, any handouts from the teacher, and online resources that help you with background ideas or conclusions.
**Note: All submissions on the work sample must be your own; handouts given to you by the teacher are meant as a guide, but they do not replace you creating and handing in your own unique work.**
Topics that must be addressed, and some questions to help you focus your thoughts:
• IDENTIFY PROBLEM: Describe the problem you were trying to solve.
*What is a dichotomous key? What is it used for? How is it similar to other kinds of trees, like phylogenetic trees or family trees, that we studied? What are conifers, how many were used, and did you use the whole trees or just a part?
• RESEARCH BACKGROUND: Describe background research that helped you design a solution.
*You worked through a dichotomous key of some of these same conifers earlier.
• DETERMINE CRITERIA AND CONSTRAINTS: Describe the criteria and constraints that affected your design solution.
*What are the rules of making a dichotomous key? (dichotomy= 2 groups) What are the difficulties of dividing a large number of things into only 2 groups?
• DESIGN SOLUTION: Accurately and precisely draw and label your design solution.
*Your first key and your second re-designed key are to be neatly drawn out on an 8.5"x11" paper.
• TEST SOLUTION: Record data and observations gathered while testing of your design solution.
*Show data in clear and appropriate format. Chart/table of results is required, additional graphical or other visual analysis improves this section.
• EVALUATE SOLUTION: Describe the strengths and weaknesses of your design.
*Use your data as evidence to answer the prompt above. Which dichotomies were most successful and which were least successful for your testers, and why did this appear to be the case? Did you anticipate these problems when you were making the key (were they the hardest dichotomies to create), or were testers' struggles with them a surprise? Explain. This is your opportunity for reflection on the process of making a key
• IDENTIFY IMPROVEMENTS: Describe at least 2 changes that would improve your design or solve the problem in a different way.
*Which areas did you choose to re-design, and why? Be descriptive. How did you go about this process with your partner(s)?
• REDESIGN SOLUTION: Accurately and precisely draw and label your redesign solution. Describe results of second round of testing, including difficulties and successes and/or failures in your re-design.
*Then, describe at least 2 changes you would make to improve your design for a third round of testing, and why those changes are needed.
Scoring the Work Sample
To view examples of work samples that meet (scores of 4), exceed (5-6), or don't meet (< 4) the standards, click on the following link, go to the bottom of the page, and select any of the high school examples and scoring descriptions in each category. We looked at the "Circadian Rhythms" HIGH score shown below in class. Note that it is an inquiry work sample, not an engineering design, so it is scored and written differently than you will write yours.
Work Samples & Scoring
Here's the official State of Oregon rubric/scoring guide for your work sample:
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