More on Rainforest "Math"
Meet the New Math, Much Worse than the Old Math
"It took parents 17 years to overturn the tragic 1989 curriculum mistake made by the so-called education experts who demanded that schools abandon traditional mathematics in favor of unproven approaches. The National Council of Teachers of Mathematics finally reversed course on September 12, 2006, and admitted that elementary schools really should teach arithmetic, after all.
The new report called "Curriculum Focal Points for Prekindergarten Through Grade 8 Mathematics" is a back-to-basics victory that rejects the type of math curricula that parents had derided as "fuzzy math" or "rainforest math." The experts preferred such hoity-toity titles as "New New Math," "Connected Math," "Chicago Math," "Core-Plus Math," "Whole Math," "Interactive Math," or "Integrated Math."
Whatever the title, these curricula imbedded the notion that estimates are acceptable in lieu of accurate answers to math problems so long as students feel good about what they are doing and can think up a reason for doing it. Fuzzy curricula were big on discussion, coloring, playing games, and early use of calculators. (MP: And group tests, too).
The 1989 report (which gives the word "standards" a bad name) flatly opposed drilling students in basic math facts, taught that memorization of math facts was bad, and failed to systematically build from one math concept to another. Children were encouraged to "discover" math on their own, construct their own math language, and flounder around with their own approaches to solving problems.
This silliness is based on the false notion that children can develop a deeper understanding of mathematics when they invent their own methods for performing basic arithmetic calculations."
Read more here.