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spark1 joined the group Environmental Science FLC 6 years, 10 months ago
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spark1 joined the group Mathematics Discipline 6 years, 10 months ago
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spark1 joined the group Active Learning 6 years, 10 months ago
spark1 joined the group Environmental Science FLC 6 years, 10 months ago
spark1 joined the group Mathematics Discipline 6 years, 10 months ago
spark1 joined the group Active Learning 6 years, 10 months ago