# Tag Info

### How can I improve my Retake Policy?

As a college math professor, I have a retake policy. I've been trying to encourage other professors to develop retake policies, and it seems to be becoming more common with resources emerging like The ...
• 1,919

### How can I improve my Retake Policy?

Many high school classes don't have a "retake policy", so you could just devolve to that. I.e. no retakes. It's sort of nice what you are doing now, but definitely not required, in my ...

### How can I improve my Retake Policy?

I'm not strictly familiar with how the US school year works, so take my suggestions as needing adaptation. I allow much restricted retakes in my classes, based on a system I met in undergrad: For ...
• 161
Accepted

### Importance of exploring skills in mathematics

"How can you improve exploring skills [skills involved in discovering new mathematics] in high school mathematics education...?" I'm still feeling fuzzy on the question. It seems related to ...
• 17k
1 vote

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### Examples of relations that are not functions

If you are also teaching sets, or a student brings this up, consider the mapping from sets to their elements: $f(\{1, 2\}) = 1\\f(\{1, 2\}) = 2$ So this is not a function. On the other hand, there is ...
• 131

### Examples of relations that are not functions

Map each country to their official languages. This might look like a (not injective) function depending on which countries you start out with but there are definitely countries with more than one ...
• 129

• 19.1k

### Equation of a straight line on two dimensional Cartesian plane

@TomKern mentioned the "standard" form above. I believe what he has in mind is ax+by=c, which allows for both horizontal and vertical lines. Another form, rarely used, but more like the ...
• 17k

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