Objective: Reading is one of the most essential skills in learning, especially English learning. Technological sophistication that developing rapidly 21st century requires students to be literate order able compete critical thinking and receive latest information. The program suitable for conditions this extensive reading, which offers reading pleasure according level students' abilities. Metho...

In the title Er(III)-erythritol complex, [Er(NO3)3(C2H5OH)(C4H10O4)], the Er(III) cation is chelated by one erythritol mol-ecule, three nitrate anions and an ethanol mol-ecule, completing an irregular ErO10 coordination geometry. The Er-O bond lengths are in the range 2.348 (3)-2.583 (3) Å. In the crystal, extensive O-H⋯O hydrogen bonding links the mol-ecules into a three-dimensional supra-mole...