s/o of math sequence question

[Chrysalis Academy]

Why does it go Algebra 1 - Geometry - Algebra 2?  Is there any mathematical reason to do it that way? 

 

Why wouldn't it be better to do all of Algebra, sequentially, without a year's break in the middle? Don't they get pretty rusty/forget stuff?

 

I'm just wondering what the rationale is for the common sequence (at least common here in the US - I understand that it's more common to do integrated math elsewhere. True?)

[Arcadia]

No logic that I can think of. My kids did algebra and geometry concurrently because I can't find an intergrated math we like. Hubby and me had intergrated math all the way from 6th to 12th.

 

ETA:

Actually probability and statistics and some discrete math topics were also integrated in.

Edited August 3, 2016 by Arcadia

[Jann in TX]

Geometry uses basic Algebra 1 and ZERO Algebra 2.

Students working Geometry after Algebra 2 will need to be disciplined enough to find and work and Algebra 2 review in order to stay fresh for Pre-Calc. (personal experience says that the 'review' rarely gets done!).

 

I've never really had a student 'forget' their Algebra 1... Geometry works on developing logic and that extra year of mental maturity really helps in Algebra 2  (where students review Algebra 1-- but see it with a different 'slightly more mature brain' then take those concepts deeper).

 

 

[Lilaclady]

I think part of the reason is due to standardized tests- SAT and ACT which have some geometry in them. Students taking algebra 1 in 9th and wants to take the tests after 10th grade will take geometry so they can do well on it.

[Mike in SA]

Geometry works on developing logic

 

This is why.  Students need to develop logical thinking, but frequently do not have the basic manipulative skills required for geometry first.  Algebra 1 will shore that up.  Most geometry programs these days assume that some basic algebra is in place.

 

Algebra 2 could definitely go before geometry, but putting a break between the two years provides repetition more effectively (the spacing effect).  If you have a stem kid, it will all even out over time, either way.

 

Classic versions of college algebra are best placed after geometry, as they cover some basic vector analysis which depend on geometric thinking.  You will see some elements in precalculus - more if you look at AOPS precalculus, which covers the full breadth of a traditional (old-fashioned) college algebra course.