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Peer Review

Binary Base-2 & Hindu Arabic Base-10 Counting

by Felipe Razo


Overall Numeric Rating:

3 stars
Content Quality: 3 stars
Effectiveness: 4 stars
Ease of Use: 3 stars
Reviewed: Dec 30, 2002 by Teacher Education
Overview: The Binary Base-2 & Hindu Arabic Base-10 Counting website is an animation of
binary (base-2) counting. The animation includes a display of the
Arabic (base-10) number to match the binary number.
Type of Material: Animation
Recommended Uses: This site could be used as a visual illustration for the binary counting system
and its relationship to the Arabic counting system by teachers of elementary and
middle school students.
Technical Requirements: Macromedia Flash 5 is required to run the animation. This site was reviewed
using both Netscape and Internet Explorer browsers on a PC.
Identify Major Learning Goals: The learning goal for this site is to develop an understanding of the binary
counting system and compare it to the base-10 place-value system.
Target Student Population: The target students include elementary, middle, and high school level students.
This animation site could also be used with higher education students.
Prerequisite Knowledge or Skills: A basic understanding of the Place-value system. Technology: need to be
familiar with the Internet, interactive tools, and Macromedia Flash.

Evaluation and Observation

Content Quality

Rating: 3 stars
Strengths: The animation on this website provides a good illustration for students to
visualize the binary counting system. The option to hear the counting of the
balls in the animation gives additional assistance to students. The place
holders for the counters are presented in organized groups. Sound method for
determining the number in base-2.

In addition to using the binary counting animation with elementary, middle, and
high school students, this site could also be beneficial to the mathematics
method courses teacher education.

Concerns: There is a concern that the website does not include any directions on how to
use the animation.

The red balls do not show up when moved to the "128s" "bin."

Potential Effectiveness as a Teaching Tool

Rating: 4 stars
Strengths: This website would be a wonderful resource to use when working with counting
systems at the elementary, middle, and high school levels. Students would be
able to see and hear the counting of each ball as it is placed in the binary
table. They would also be able to compare the binary to the Arabic number.

Teacher education mathematics courses could use this site as an illustration of
ways to use technology to integrate into the curriculum. Preservice teachers
could incorporate this animation as a resource site when preparing lesson plans
for their students.
Concerns: It would also be helpful if the site presented teaching ideas and strategies to
use with the binary counting animation.

The visual is busy with "extras" that are non-functional.

Ease of Use for Both Students and Faculty

Rating: 3 stars
Strengths: The counting animation website has an attractive and appealing design. After
the directions are figured out, the counting machine is not difficult and is fun
to use. The binary and the Arabic counting systems are presented in an easy to
Concerns: The users may lose some of the capabilities of the animation without the
directions stated on the website.

It may be easier for the users if a message was given when the number entered
will not calculate in the animation program.

Other Issues and Comments:
Comments from Author: The displays are only two of many, which are intended to promote visual auditory, interactive, realistic-like environments. They are intended to
motivating and help in the effective learning of concepts in elementary
mathematics. Those displays are part of a set which includes matching
physical materials related to counting, and number bases.