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# Doug Massey

• Doug Massey commented,

This issue, all by itself, justifies the expense of IXL.  I used to be a Khan Academy Ambassador and gave up trying to convince them to keep real-time data in tool.  I now spend my volunteer time h...

• Doug Massey commented,

Unfortunately, what you're looking for is right here:

• Doug Massey commented,

I've never heard of Khan Academy offering to merge two student accounts (you certainly cannot do so as a Coach or a Learner). However, there is a solution . . . you might not like it though.I had a...

• Doug Massey commented,

Wow, that's a really good question!I use graphed data and linear best fit equations to determine correlations in scatter plots all the time, but I can't immediately think of a way to create an equa...

• Doug Massey commented,

Careful with the arithmetic, though -- your function (by using your formula!) should actually be f(x) = x^2 - 10x + 50(and your formula has an extra parenthesis you don't need after the equal sign,...

• Doug Massey commented,

Both!It is a known formula -- it's the only possible product when the complex conjugate root factors are multiplied together -- but you did discover it on your own, and you get credit for it!I spen...

• Doug Massey commented,

Teachers can only add students if the student then clicks on the notification and approves it (at least, I think that's the way it still works). At some point, the student has to approve. Compare t...

• Doug Massey commented,

Alternatively, click on Subjects in the upper left, then select "Math by Subject".  That's a not-so-obvious link to the World of Math mission. That'll show you your current standing for all 1422 sk...

• Doug Massey commented,

It's the latter choice. Khan Academy was designed for the self-motivated student, rather than for school. As a result,it's designed so that the students add and remove coaches/teachers, rather than...

• Doug Massey commented,

You might consider creating an extra class called "Everyone" or something, and then adding all of your students to that class (as well as leaving them in your individual classes).  Then you'd have ...

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