I can try and help.
Most younger grade math curriculums have geometry as part, like a chapter or two, of their overall math curriculum, including Calvert, the one I'm using. Its not of course, until high school that is becomes a separate subject, I mean studied by itself. I was also reading somewhere that American based math curriculums are the only ones that do that. mmmm!
Any-oh-hoo! I like a spiral approach to Math as opposed to mastery of concept. Yes I have a gifted son who does like mastery approach, but I always have the option of adding more review with spiral curriculums if I see the need too. (MY need too LOL) So thats why I chose Calvert math. Its more of a spiral approach as opposed to Singapore which is more mastery of concept. In otherwords, geometry is added each year, building and reviewing from the previous year.
Calvert math is stand alone from the rest of the curriculum. You can order the math and teacher's manuals, complete with answers. In addition, the eduction counselors are free of charge. They are teachers who can be called at an 800 # anytime during the normal business hours. Other than the lesson manual being a *soul saver*
I decided to stick with Calvert because of that very point of being able to call them and get advise, tips,suggestions and *basically how do I do this?*. I don't really consider math my strong point, even though it seems to be ds. Math is dh strong point. But, when you ask him *how did you get that answer,to explain to the boys* Well thats a different story!
So because of that and the fact Calvert does go to 8th grade I'm using them because of the amount of review, good manuals and phone calls just minutes away.
I know Calvert teaches geometry generally on the levels below. Maybe, that can help you see how much a sixth grader could know. Remember now this is a spiral approach so basically from the beginning they start geometry, which I'm sure you know, but along in 3rd grade, they step it up a tad..Heres the basic outline as I have it written down (since I had checked into this too before I orered Calvert)
Begin to introduce line segments as opposed to line
introduction to angles(right,obtuse and actute)
introduce that they can be measured (but measuring is saved to 5th grade)
ds is already measuring them so
Just being sure they understand differences between flat and solid shapes
Also introduce line of symmetry
Even though congruent is introduced in K, each grade builds more and more
angles (acute,obtuse, right)
lines of symmetry
simple point on grid
Here again, review of solid shapes
ideas for drawing circles (radius and diameter)
more angle review
again more on congruent
symmetry, much more complex
Also how you can slide, flip and turn figures
Starts off with review of basic terms learned over the past few years
intersecting parallel lines
further study of different triangles and quadrilaterals(you know squares,etc.)
construction of circle
using compass to create one of similar size
translations,reflextions,rotations of shapes (like the flipping,sliding and turning)
Also, I guess I didn't know if you were looking for a whole new curriculum or help in geometry or both? LOL So in addition to the math I use, I have heard about 1-2-3 Math. I have never used it. But it suppose to be like ALL geometry in one place instead of scatterd about like most math curriculums like to do. So maybe that might be one possibility of helping her until you decide what you want to do. I have not check all the good math websites, but there has to be some good review on geometry, especially if you want to to switch curriculums.
But the problem you present is one I could foresee happening to us
I completely understand. So I always feel more comfortable with a math curriculum that I can ask questions on to be sure *I* understand since it will one of my weakest points. Even having the answers does not help a lot of times in more advanced math, or for me anyway.
BTW, I have also heard good things about Rod and Staff math. Their teacher's manuals are suppose to be good. Here again though for ME only, the disadvantage is not being able to call and ask questions.
Does this help any?