Those are good suggestions. Â I'd also add "Meet the Great Composers" and "Stories of the Great Composers", published by Alfred music publishing. Â Meet is for older kids (say, 10 and up) and Stories is for the younger ones. Â There's also The Time Traveller's Guide to Music History... I think that's the title... I think it's also Alfred... it's for younger kids too and is quite cute.
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If you want something more intensive, there's a composers lapbook out there... I'll have to look up the source again... It's absolutely massive in the amount of information, I think it covers about 70 composers and goes into detail for all eras.
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Another approach might be "Ancient Art and the Orchestra", the middle school level from Harmony Fine Arts and Music. Â It's a guided course in artwork of the ancient world, but folded into it is some music study as well -- it's more along the line of 'music appreciation', features an instrument for a week or two along with a composer known for that instrument, has links to web resources/activities, lots of listening, etc. Â
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They also have resources for lower grades, guided composer introductions and music appreciation, etc... The middle school one is the only one I've used personally, though. Â They look nice though! Â They use some of the books I've mentioned above, in fact... heh...
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