ED3662 Lecture 7: Tutorial Seven 3D objects
Tutorial Seven: 3D objects
3D Objects
- Don’t sa shape
Phases of the instructional Cycle (Alagic, 2004; Way, 2011)
- A student may need to cyclethrough some of the five phases more than once with a particular
topic
o Information
▪ Through discussion, the teacher identifies what students already know about a
topic and the students become oriented to the new topic
▪ Gives students a task, and then listens to what they know
▪ Students are encouraged to explore the materials; they will discover
some properties and structures
▪ While students are playing, the teacher observes and informally assesses
both thinking and language
o Guided orientation
▪ Students explore the objects of instruction in carefully structured tasks such as
folding, measuring, or constructing
▪ The teacher ensures that the students explore specific concepts
o Explication
▪ Students describe what they have learned about the topic in their own words
▪ Teacher introduces relevant mathematical terms
o Free orientation
▪ Students apply the relationships they are learning to solve problems and
investigate more open-ended tasks
o Integration
▪ Summarise and integrate what they have learned, developing a new network of
objects and relations
Reading Seven:
Questions from the text
- Describe the four rigid transformations
o Fied, shape doesn’t change
o Change position of the shape
▪ Rigid transformations preserve size and shape
o Rotate – Turn
o Translate – slide
o Reflection – Flip
o Slide Reflections – Slide then flip
- Describe the non-rigid transformations
o Non-rigid transformations is where the process changes the objects shape and size
o Similar transformations
▪ Keep the same shape but the size changes
• Enlarging and reducing
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