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Anyone use Critical Thinking Company's Understanding Algebra I?? Reviews?

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Looking for DS12 for next year. We tried book 1-2 of Key to Algebra, a bit too slow and tons of practice/review (probably be perfect for DD9 when she is ready).


DS12 wants a workbook approach. 


Anyone who has tried it: Are the pages crisp and clean? Key to was a bit too "messy" for him and overcrowded. He prefers more along Singapore or MUS layout versus MM.


Is it a full Algebra program as they claim? 


If you used it did you get the book or PDF???? (I can print cheap, just thinking I could divide it up and bind it into 1/3s so it wouldn't be so bulky if I print it.)


Any other workbook based Pre-Alg or Alg? 


He will be going into 7th technically. I'm not looking for online or dvd based (trying to keep tech just for typing papers and research).


Thanks :)

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