Eliciting studentsâ ideas about space
be aware of studentsâ ideas so that you can challenge or progress their thinking
the more we know about our studentsâ ideas the more we can use appropriate techniques and strategies to try to help them move their ideas towards those which are more scientifically acceptable
give students open-ended responses as this will provide a more accurate representation of their thinking
Year 3 example - give students the words sun, moon, stars, space, and earth and ask them to write down everything they knew about these words. At the end of the unit have students repeat the activity and reflect on their progress
other elicitation (drawing out) techniques: drawings, concept cartoons, use of concrete materials (modelling), concept maps, discussions (in line with social constructivist theory)
How studentsâ ideas about space develop
prescientific - a view of the universe with humanity at its centre and the universe as a flat infinite space
geocentric (earth centred) - the universe is seen as having changes in the vicinity of the earth, which is surrounded by a finite sky with heavenly bodies around it
heliocentric (sun-centred) - the sun is seen as surrounded by the earth, moon, planets and stars, and these are thought to be in the centre of the universe, which is fixed and unchanging except in our solar system
sidereal (star centred) - our solar system is only one of many in the universe, which is constantly changing with various suns, moons, earths, planets, red giants, white dwarfs, galaxies, black holes, neutron stars, and other bodies
get students to ask questions that interest them about the earth, sun, moon, planets and stars. possibly introduce question boxes
orienting students to a topic and engaging their interest is the first step in sequencing lessons for constructivist learning
Engaging studentsâ interest in space:
link with visual art KLA - mural of the solar system, an artistic view on how it would be like to travel through space
link with numeracy KLA- concept of shapes
link with literacy KLA - students market a planet using persuasive skills, writing a media story about the discovery of a new planet
relating space events to everyday life - stuff in the news
field trips to a planetariumÂ
linking with the community in person or electronically, or even talking to astronautsÂ
using childrenâs fiction/nonfiction literature (be wary of accuracy)
organising space week at school
watching space related films and commenting on the validity
reenacting historical events (such as galileo getting jailed for talking about earth revolving around the sun)
There are prerequisites for the development of explanatory models of the solar system. young learners should be exposed to sufficient experiential concepts before or in conjunction with explanatory concepts and models. experiential concepts are those that learners can directly experience.
Examples of experiential tasks
shadow stick observations
observing and recording the sunâs movement across the sky
a record of the moonâs shape over the period of a month
observable differences between planets and stars
Questions about space that could lead to investigations and or observations
~ an investigable question is one which requires students to take observations and or use hands on materials in order to find an answer ~
what path does the moon take across the sky?
how does the moon change its position in relation to the sun?
are the stars in the same place from night to night?
do all stars look the same? how are they different?
which patterns can you see in the stars?
can direction be found using the stars?
is it possible to see planets with the naked eye?
a concept cartoon on this topic: will grandma stay in the shade all afternoon under the tree or will the children need to wake her up and move her at some point? devise a hands on way to investigate the problem
a monthly shadow journal for older children will engage them to find out why their shadow changed
when taking students to a planetarium, speak to the staff so they cover relevant topics and not speak about things that are beyond studentsâ understanding. Also, the visit should be integrated with in school experiences before and after.
use physical and virtual models that depict or represent the 3D nature of astronomy
physical models are a way of representing a concept or understanding, and having children create their own helps them develop their conceptual understanding.
astronomy role playing - various planets revolving around the sun, zodiac star patterns, eclipses, moon rotations, etc.
Beware of 3 things when using physical models:
do not replace hands on experiences for second hand ones (like the model)
be critical when choosing the model
explicitly point out the aspects you are trying to help them learn
Multimodal representations
student learning is enhanced if new ideas are encoded in multiple ways. this can be done if teachers use and encourage students to use different modalities to represent phenomena, for example movement (kinaesthetic), touch (haptic), visual, and auditory.
Hubber and Haslamâs principles to guide the use of multiple representations using different modes:
teachers should identify the main concepts underpinning a topic and the most common alternative conceptions primary students may hold
Get the students to critique each representations to see that they are limited
insist that students manipulate their models - for example, varying the variables and reasoning out the effects
Learning occurs from the inside out (from where the studentsâ thinking is), rather than from the outside in (imposed by the teacher).
First hand and second hand experiences in astronomyÂ
4 teaching principals have been emphasized about the types of strategies to use when teaching about space:
the importance of taking first hand observations and planning and conducting hands on or field based investigations (even if it be via models and simulations)
where possible, using the studentsâ own ideas as the stimulus for the investigations and other means of learning
the need to explicitly connect experiential and explanatory concepts, when the learning outcome is the latter
incorporating multiple and multi modal representational learning into the tasks
Learning outside implies that science does not just occur indoors
Second hand experiences should not replace first hand observations or hands on activities, except when phenomena is inaccessible in other ways.
http://pds.jpl.nasa.gov/planets/
http://space.jpl.nasa.gov
http://www.scootle.edy.au/ec/p/home>science>earthandspace>universe
www.abc.net.au/science/askanexpert/
construction of scale models of planets and the distances between them
creating a space dictionary
use realtime images from NASA taken at intervals to show students that the earth moves (yr 2)
students speaking directly to astronauts through NASA link up program
communicating via email with scientistsÂ
5E Sequence - Solar System
Engage - seek studentâs written responses about what a model is and what scientists use them for. Also how did scientists develop a model of the solar system? give students images of an accurate and an inaccurate model of the SS and give them criteria, which they will use to mark the model and compare.
Explore - students construct a sentence strip model of the solar system and compare it with other models
Explain - have a class discussion where students compare their models with other models and discuss any problems with the sentence strup model.Â
Elaborate - if students are mathematically capable, they could create a sentence strip to scale (optional)
Evaluate - ask students what they have learnt about creating scientific models as well as about the solar system