Web-based Practice
Time - Analog and Digital Clocks by NLVM
Subject
Math, Science & Technology
Virtual Manipulative
Click here for this interactive resource.
Description
There are three closely related Clock manipulatives (Clock, Match Clock, and What Time Will It Be?), and it is well to become familiar with all three in deciding how to use them with any particular student or class, and certain class activities may make use of more than one of the manipulatives.
The Clock manipulative allows the user control of the hands of the Face Clock and because of the linking possible between the Face Clock and the Digital Clock, this manipulative can help young students to tell time with the two styles of clocks they are most likely to encounter.
For example, with a projection unit, students can set either clock to specified times. While the class is learning to read time on Face Clocks, the teacher or one student with the mouse can challenge the class to read the time shown on the (unlinked) clock being projected for the class.
This kind of exercise is precisely what is tested by the library of problems for the Match Clock manipulative. Students are to make the time displayed on one clock match the time shown on the other clock. Then they can check their answer before going on to the next problem.
Learning to "add and subtract time" is another measurement skill that challenges many students. With the Clock manipulative, it is easy to move the hands of the Face Clock fifteen minutes ahead or twenty minutes back or to make similar adjustments to the Digital Clock. Then it is simply a matter of reading the resultant time as shown. As students become more confident with the operations of the clocks and the fact that every sixty minutes the hour changes and the minutes "start over," they can be expected to perform some of the operations mentally and can answer questions about "What time will it be...?" and "What time was it...?" Such questions form the problem library for the What Time Will It Be? manipulative (which includes problems of both types).
Content Provider
The National Library of Virtual Manipulatives is a three-year NSF supported project to develop a library of uniquely interactive, web-based virtual manipulatives or concept tutorials, mostly in the form of Java applets, for mathematics instruction (K-8 emphasis). The project includes dissemination and extensive internal and external evaluation. For more information, please visit http://nlvm.usu.edu/en/nav/vlibrary.html.
Credits
Principal Investigators
Larry Cannon
Jim Dorward
Bob Heal
Leo Edwards
Java Applet Programming
Ethy Cannon
Joel Duffin
David Stowell
Zeke Susman
Richard Wellman
Jennifer Youngberg
Web Site Programming
Joel Duffin
