Mathematics 24x7

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# January 2010 Blog Posts (6)

### How much repetition is necessary?

I have been talking about homework and practice. How much practice is necessary for a student to really understand how to do something? I have seen research that says 20-30 repetitions will generally store something in permanent memory. Many have posted on the forum/discussion site that they assign 5-10 problems. Is this enough? Is it only once or is it 5-10 related problems for more than one day? I have students that require several days of practice before they get some topics - and even then… Continue

Added by Paula Larsen on January 28, 2010 at 9:11am — 4 Comments

### Graphic organizers

Have any of you used graphic organizers. I use a foldable with my students while teaching the chapter on quadrilaterals in geometry. It seems to help them. I am interested in learning a variety of ideas that any of you have found helpful in your math classrooms.

Added by Charlene Price on January 28, 2010 at 8:32am — 2 Comments

### New ideas for extra credit wanted

I am looking for new ideas for extra credit for my students. I don't believe that students should be able to pass only because of extra credit. I have assigned review pages the day before the test, hoping that it would help the students two ways, first with extra credit points and then by improving the test scores. Usually, the A students are the ones who do it. I have considered having students look up videos on You Tube, but am not sure how that would be graded. Do any of you have ideas for… Continue

Added by Charlene Price on January 24, 2010 at 8:31am — 3 Comments

### Geonext Tutorial 1 - Constructing an Equilateral Trianlge

Added by Guillermo Bautista on January 22, 2010 at 2:10pm — No Comments

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Added by Rashmi Kathuria on January 22, 2010 at 1:30pm — 1 Comment

### HOW MANY LOCKS ARE REQUIRED AND HOW MANY KEYS EACH GENERAL HAVE TO OPEN THE SAFE?

Hello,

Friends.I am a newly joined member of this site. And feeling interesting to read and learn different

things in mathematics.I am a lecturer in mathematics and taking the course of Combinatorics.I came a

across the following problem problem '' Six Generals propose locking a safe containing top secret with a

number of different locks.Each General will be given keys to certain of these locks.How many locks are

required and how many keys must each General have so that… Continue

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