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Order Matters: Sequencing Scale-Realistic Versus Simplified Models to Improve Science Learning

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Abstract

Teachers choosing between different models to facilitate students’ understanding of an abstract system must decide whether to adopt a model that is simplified and striking or one that is realistic and complex. Only recently have instructional technologies enabled teachers and learners to change presentations swiftly and to provide for learning based on multiple models, thus giving rise to questions about the order of presentation. Using disjoint individual growth modeling to examine the learning of astronomical concepts using a simulation of the solar system on tablets for 152 high school students (age 15), the authors detect both a model effect and an order effect in the use of the Orrery, a simplified model that exaggerates the scale relationships, and the True-to-scale, a proportional model that more accurately represents the realistic scale relationships. Specifically, earlier exposure to the simplified model resulted in diminution of the conceptual gain from the subsequent realistic model, but the realistic model did not impede learning from the following simplified model.

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Acknowledgments

This work was supported in part from funds from a George E. Burch Foundation fellowship to the Smithsonian Institution for MHS. We thank the faculty members of the Bedford High School Science department for their contributions to this experiment, Jon Sills for encouraging this research, and Robert Speiser for insights and discussion. Assessment items were generated with funding from the National Aeronautics and Space Administration’s Structure and Evolution of the Universe Forum (NCC5-706) and from the National Science Foundation grant for MOSART (Misconceptions-Oriented Standards-Based Assessment Resource for Teachers, NSF HER 0412382). Any opinions, findings, conclusions, or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation, the Smithsonian Institution, or the National Aeronautics and Space Administration.

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Appendices

Appendix 1

See Tables 1, 2 and Figs. 1, 2, 3.

Table 1 Final fitted multilevel models describing differences in participant responses to scale-related and scale-neutral questions as a function of treatment type and order of presentation, controlling for the fixed effects of class and gender (in percent)
Table 2 Estimated impact of exposure to either the True-to-scale or the Orrery solar model, when implemented as the first or second treatment, on student responses to scale-related and scale-neutral questions about astronomy (estimated impacts constructed from slope estimates listed in Table 1)
Fig. 1
figure 1

Sample stimuli for Orrery and True-to-scale models. Screen shots from the Solar Walk app (Vito Technology, Alexandria, VA) used in this experiment. Left column are examples of “Orrery (ORR) mode” exaggerating the size of bodies relative to their orbits. Right column are the same views seen in “True-to-scale (TTS) mode,” treating scale relationships more accurately

Fig. 2
figure 2

Estimated growth trajectory of scale-related astronomy concepts as a result of different order of model exploration. The solid line represents that the students are using True-to-scale (TTS solar model. The dashed line represents that the students are using Orrery (ORR) solar

Fig. 3
figure 3

Estimated growth trajectory of scale-related astronomy concepts as a result of different order of model exploration. The solid line represents that the students are using True-to-scale (TTS solar model. The dashed line represents that the students are using Orrery (ORR) solar model

Appendix 2: Measurement items

  1. 1.

    How long does it take for the Moon to go around the Earth?

    1. a)

      1 day.

    2. b)

      1 week.

    3. c)

      1 month.

    4. d)

      1 year.

    5. e)

      It never happens.

  2. 2.

    You observe the Moon tonight in the first quarter phase (figure A). What is the least time you will need to wait until you can see the full Moon (figure B)?

    1. a)

      6 h

    2. b)

      1 day

    3. c)

      1 week

    4. d)

      2 weeks

    5. e)

      1 month

  3. 3.

    Janice goes outside to observe the Moon one evening. Looking south, she sees the Moon at position C in the sky in the diagram below. At what position will she see the Moon in 1 h?

    1. a)

      Position A

    2. b)

      Position B

    3. c)

      Position C

    4. d)

      Position D

    5. e)

      Position E

  4. 4.

    An eclipse of the Sun can only occur:

    1. a)

      In the spring.

    2. b)

      In the fall.

    3. c)

      At the summer or winter solstices.

    4. d)

      When the Moon is full.

    5. e)

      When the Moon is new.

  5. 5.

    If you could look down from space at the Earth from far above its north pole, the Sun and Moon would be in the directions shown by the arrows in the picture below. What would the Moon look like to a person on the Earth facing the Moon?

  6. 6.

    Which shape of the Moon below will be seen least often during 1 year?

  7. 7.

    When could you see a full Moon on the eastern horizon?

    1. a)

      Sunrise

    2. b)

      Sunset

    3. c)

      Noon

    4. d)

      Midnight

    5. e)

      Anytime of day or night

  8. 8.

    One night you looked at the Moon and saw Figure A. A few days later you looked again and saw Figure B. Why did the Moon change shape?

    1. a)

      Clouds covered part of the Moon.

    2. b)

      The Moon moved out of the Earth’s shadow.

    3. c)

      The Moon moved out of the Sun’s shadow.

    4. d)

      The Moon is black and white and rotates on its axis once a month.

    5. e)

      We see a different amount of the illuminated side of the Moon.

  9. 9.

    Boston is one quarter of the way around the Earth east of Hawaii. If a person in Hawaii sees a full Moon, shape D below, which shape would the Moon look like to a person in Boston that same day?

  10. 10.

    Which is the most accurate model of the Moon in relative size and distance from the Earth? (The larger object in each model is the Earth.)

  11. 11.

    Of the following choices, which looks most like the Earth’s path around the Sun?

    Response deliberately omitted This item is actively being used in research at the time of this publication and has been redacted to preserve the integrity of ongoing studies that may be compromised by the broad publication of this item. Interested readers are referred to MOSART (Misconceptions-Oriented Standards-Based Assessment Resources for Teachers) where this item and others are available in a self-service test bank of items: http://www.cfa.harvard.edu/smgphp/mosart/. Tests there can be freely accessed after completion of an online tutorial that explains test design, use, scoring, and interpretation of results.

  12. 12.

    If you used a basketball to represent the Sun, about how far away would you put a scale model of the Earth?

    1. a)

      1 foot or less.

    2. b)

      5 feet.

    3. c)

      10 feet.

    4. d)

      25 feet.

    5. e)

      100 feet.

  13. 13.

    During July at the North Pole, the Sun would:

    1. a)

      Be overhead at noon.

    2. b)

      Never set.

    3. c)

      Be visible for 12 h each day.

    4. d)

      Set in the northwest.

    5. e)

      None of the above.

  14. 14.

    The main reason for it being hotter in summer than in winter is:

    1. a)

      The Earth’s distance from the Sun changes.

    2. b)

      The Sun is higher in the sky.

    3. c)

      The distance between the northern hemisphere and the Sun changes.

    4. d)

      Ocean currents carry warm water north.

    5. e)

      The Sun produces heat and light at a faster rate in the summer.

  15. 15.

    If the Earth’s orbit was perfectly circular, what would happen to the seasons?

    1. a)

      There would no longer be seasons.

    2. b)

      The southern hemisphere would always be in winter.

    3. c)

      The northern hemisphere would always be in winter.

    4. d)

      Fall and spring would last twice as long.

    5. e)

      We would have basically the same seasons.

  16. 16.

    Order the following from smallest to largest.

    • Earth diameter

    • International Space Station altitude

    • Distance Earth to Jupiter

    • Distance New York to Los Angeles

    • Distance Earth to Sun

    • Distance Earth to Moon

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Chen, C., Schneps, M.H. & Sonnert, G. Order Matters: Sequencing Scale-Realistic Versus Simplified Models to Improve Science Learning. J Sci Educ Technol 25, 806–823 (2016). https://doi.org/10.1007/s10956-016-9642-4

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