Teachers will be able to effectively apply and implement the NGSS Practice 6 Constructing Explanations and Designing Solutions in their classrooms using their current curriculum What do you know about NGSS ID: 325514
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OBJECTIVE:
Teachers will be able to effectively apply and implement the
NGSS Practice 6: Constructing Explanations and Designing Solutions
in their classrooms using their current curriculum. Slide3
What do you know about NGSS?Slide4
NGSS Practices
Practice 1: Asking questions and defining problems
Practice 2: Developing and using models
Practice 3: Planning and carrying out investigations
Practice 4: Analyzing and interpreting dataPractice 5: Using mathematics and computational thinkingPractice 6: Constructing explanations (for science) and designing solutions (for engineering)Practice 7: Engaging in argument from evidencePractice 8: Obtaining, evaluating, and communicating informationSlide5
As you read use the insert reading strategy below to reflect on the ideas presented in the article.
Symbol
Meaning
New
or interesting informationI already knew this or I have heard this before?I do not understand or needs clarificationSlide6
PROBLEM:
You are the owner of a junkyard. A tractor trailer was just towed to the junkyard, but you realize that the current electromagnet you have been using to move cars is not strong enough to pick up the tractor trailer.
Question: How should the junkyard modify their electromagnet in order to move the tractor trailer?Slide7
What background knowledge do your students need in order to solve this problem?
w
hat is an electromagnet
p
arts of an electromagnetstrength of electromagnets can be changedideas for ways to increase the strength of an electromagnetSlide8
BRAINSTORM:
What variables could you change in order to increase the strength of an electromagnet? Slide9
VARIABLES:
Material of core
Size of core
Type of wire
Thickness of wireLength of wireSize of batteryStrength of source (number of batteries)Number of coilsSlide10
Lesson Variations
Students fully design and carry out changing the number of coils
Next day, students choose two or three other variables to investigate (procedures are already given)
Students only investigate one other variable and then share class data Slide11
Connections to Other NGSS Practices
Practice 3:
Planning and carrying out investigations
Practice 5:
Using mathematics and computational thinkingPractice 8: Obtaining, evaluating, and communicating informationSlide12
Constructing an Explanation
“ An explanation includes a claim that relates how a variable or variables relate to another variable or a set of variables. A claim is often made in response to a question and in the process of answering, scientists often design investigations to generate data.” (NRC Framework, 2012, p. 68-69)
“ …explanation of phenomena, whether based on observations they made or models they have developed…” (NGSS Release, 2013) Slide13
Question: How should the junkyard modify their electromagnet in order to move the tractor trailer?
Write an explanation that answers the question above.Slide14
Exemplar Explanation
(claim) The junkyard owner should change the electromagnet by increasing the size of the core, the thickness of the wires, and the strength of the power source. (evidence) In the lab, when we increased the number of nails in the core from one to three the, the data shows that the number of staples increased from _______ to _______. When we increased the thickness of wire … NOT FINISHED!!!Slide15
Designing Solutions
“In engineering, the goal is to design rather than an explanation. Engineers’ activities, however, have elements that are distinct from those of scientists. These elements include specifying constraints and criteria for desired qualities of the solution, developing a design plan, producing and testing models or prototypes, selecting among alternative design features to optimize the achievement of design criteria, and refining design ideas based on the performance of a prototype or simulation.” (NRC Framework, 2012, p. 68-69)Slide16
Designing Solutions
You are the engineer who is going to solve the problem at the junkyard. Draw a design to show the junkyard owner what modifications need to be made to the electromagnet. Be sure to label the parts that were changed and how they were changed.