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Chemistry. Many items in the Chemistry 4: Chemical Reactions in Our World 1-Class Unit Kit, Carolina Certified Version* (item #116421), may be reused. This 1-Class Refurbishment Set, compatible with the Carolina Certified Version of the unit, replenishes kit items that cannot be reused or were consumed during instruction.

*All enhancements to materials and instruction for this Carolina Certified Version of the unit are approved by OpenSciEd® to preserve the integrity of the storyline and the instructional model.