think again! will present a math problem every weekday; nundays, rainy days, and non-existing days included. In the weekend it is time for playful thinking and reflections.
Why? you cry! A lot of reasons. Here are two.
1. If you are a math teacher or a parent you should feed your kids problems and challenges, not answers and the remote. Good problems are not easy to come by, so I will collect some here.
2. If you like to exercise your mind, I like to hear your thinking. That is what the comments section is for. How do you solve problems? Don’t just give the answer, tell me how you found it. I like to learn from you.
Learning starts with questions and problems, not with answers and solutions. John Locke was right when he said that the mind is a fire to be ignited, not a pot to be filled.
The problems in think again! are not problems, they are seeds to start you thinking. If a problem is too hard, simplify it. If a problem is too easy, generalise it. If a problem is not to your taste, solve a similar problem. Whatever you do, post a comment and share your thinking. Challenge the other readers, share with them your findings and how your mind operates.
A short presentation of myself: My name is Jan Nordgreen. Born in Norway, 1952. I have taught junior high school to teacher college for more than twenty years in several countries. I like learning more than teaching, so I try to teach in such a way that I learn from my students. My main interests are mathematics and information technology. Currently I live in Santa Cruz de Tenerife, Spain. Click here to visit my other web sites.
You are encouraged to email me problems for use in think again! at firstname.lastname@example.org. It may be a good idea to use the search option first to see if the problem has already been presented. Please do not post problems in the comments section if they are not related to the problem at hand.
think again! started in May 2004 and has had its share of breaks thanks to hurricanes, unfriendly internet service providers, and travelling. Pmachine was the blog software from the start till November 19, 2007. Now WordPress is being used. The posts and comments for the Pmachine period will be imported into WordPress as soon as I find the proper code (or you write it for me). Till then click here.
If you are the copyright owner of an image I use and would like me to remove it from this blog, kindly email me at email@example.com and I will do so immediately.
[Updated: March 09, 2011]