Passage Summary: Two studies showed that people using cheap, simple tools learned just as well as those using expensive, fancy technology, so we shouldn't always spring for the high-tech stuff.

Conclusion: High-tech educational tools are not always the necessary or best purchase.

Reasoning: Studies show that low-tech, inexpensive methods, such as toothpicks or cardboard models, can produce results equal to expensive, high-tech simulations.

Analysis: The argument moves from the fact that low-tech works just as well as high-tech to a normative claim about what one should buy. To justify this reasoning, we need a principle that links performance parity with purchasing decisions. Look for a rule that suggests if a cheaper option is just as effective as an expensive one, the expensive one is not the preferable choice. This bridges the gap between the effectiveness of the tools and the actual decision to purchase them.