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MERLOT II


    

Peer Review


Geometry Gallery-Basic Geometry

 

Ratings

Overall Rating:

5 stars
Content Quality: 5 stars
Effectiveness: 5 stars
Ease of Use: 5 stars
Reviewed: Jun 02, 2002 by Mathematics
Overview: A collection of nine modules based on JAVA applets illustrating basic theorems in plane geometry:
Angles on a chord
Angles on a chord and center
Similar triangles
Angles between parallel lines
A right kite
Another right kite
Perpendicular bisectors of a right triangle
Incircle
Pythagorean triples
Most of the modules are organized as questions for students to explore.

Please see the associated reviews of the main href="http://www.merlot.org/artifact/PeerReviewDetail.po?rOid=1010000000000021523">
Geometry Gallery site and the href="http://www.merlot.org/artifact/PeerReviewDetail.po?rOid=1010000000000021522">Advanced
Geometry modules.

Learning Goals: To assist and enhance student's understanding and retention of basic geometry theorems.
Target Student Population: Beginning students in Plane Geometry.
Prerequisite Knowledge or Skills: Some familiarity with elementary geometrical concepts (circle, angle, radius, chord, etc.). Ability to read instructions and to handle a mouse.
Type of Material: Interactive modules based on JAVA applets
Technical Requirements: Computer with browser supporting JAVA.

Evaluation and Observation

Content Quality

Rating: 5 stars
Strengths: These are the Platonic ideal of interactive geometry modules, streamlined and efficient. The organization as "research questions" makes them ideal for assignment to students. Only "Similar triangles" does not have an explicit goal to explore. "Angles on a chord and center" and "Perpendicular bisectors of a right triangle" are especially recommended. "Pythagorean triples" has several parts and would make a good week or two-week project.
Concerns: None.

Potential Effectiveness as a Teaching Tool

Rating: 5 stars
Strengths: There is a range of questions, from very elementary to challenging, to suit all levels of students. The modules are very effective bringing to life the geometric phenomena.
Concerns: None.

Ease of Use for Both Students and Faculty

Rating: 5 stars
Strengths: Explanations are clear and useful. A uniform notation standard is used throughout: movable points are highlighted in the same way, etc. Applet functioning is very smooth.
Concerns: 1. A common problem with this kind of software is the representation of measurements by decimals with many, many places. Rounding off (to, say, two places) would assist immediate comprehension.
2. In some applets (e.g. Angles on a Chord) it would be nice if it were easier to move a point on a circle without changing the radius of the circle.
3. Site would be easier to use if there were a "return to main menu" button on each sub-page.