A $\sigma$-weakly closed subspace $\mathscr{S}$ of $B(\mathscr{H})$ is said to have Property $S_\sigma$ if for any $\sigma$-weakly closed subspace $\mathscr{J}$ of a ...
In 1984, educational psychologist Benjamin Bloom published research on a new method of teaching, commonly called Bloom’s 2 Sigma Problem. Wikipedia summarizes it: “The average student tutored ...
In his 1984 paper, The Two Sigma Problem, educational psychologist Benjamin Bloom demonstrated that building “more favorable conditions” into all of the environments in which children grow and learn ...
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