AimeeM Posted December 19, 2011 Share Posted December 19, 2011 Has anyone used the Key To... series as their core math? Of course adding in things like negative numbers. Just wondering. Autumn seems to respond beautifully to the Key To series, gets overwhelmed by the "busyness" of Singapore, did well with CLE - but we would prefer not to purchase from CLE for faith and personal reasons. I was thinking/flirting with just using Key To and supplementing for things like negative numbers, but I'm not sure where that would leave us when we finish the series... Quote Link to comment Share on other sites More sharing options...
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