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Student teams-achievement divisions (STAD) is a Cooperative learning strategy in which small groups of learners with different levels of ability work together to accomplish a shared learning goal. [1]
After becoming popular among the public, this kind of teaching aid remained the primary use of jigsaw puzzles until about 1820. [7] The largest puzzle (40,320 pieces) is made by a German game company Ravensburger. [8] The smallest puzzle ever made was created at LaserZentrum Hannover. It is only five square millimeters, the size of a sand grain.
Jigsaw was expected to leverage more of Alphabet's engineering talent and resources to build more sophisticated products. [10] Jared Cohen, formerly with the Policy Planning Committee at the US State Department, was the CEO of Jigsaw until 2022. [11] In January 2023, Alphabet announced about 12,000 employees being laid off.