We present the Staggered Torsional Electrostatic Combdrive (STEC) fabrication process that creates thick mirrors with hightorque actuators, thereby allowing high-speed optical scanning with large angular deflections.We have demonstrated a 550 pmdiameter mirror capable of scanning an optical angle of 24.9" at its 34 kHz resonant frequency with less than 30 nm static and dynamic deformation.The optical resolution is 350 pixels -very near the diffraction-limited resolution of 355 pixels with 655 nm wavelength light.

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We have demonstrated flat, lightweight micromirrors with high resonant frequencies for fast beam steering. The low mass of these tensile-optical-surface (TOS) micromirrors, which consist of tensile polysilicon membranes stretched across stiff, single-crystal silicon-rib structures, enables the mirrors to have both high resonant frequencies and large DC deflection angles. The TOS mirrors can scan at frequencies up to 68.2 kHz while limiting dynamic deformation to be less than -70 nm, (approximately U10 at the measurement wavelength of 688 nm). Dynamic deformation as low as 20 nm has been shown on a lower-frequency design having a wider support rib. The effect of adding a 50 nm-thick layer of gold to improve reflectivity is negligible on the deformation of the micromirror.

In this paper, I examine the development, implementation, and results of utilizing three types of storybooks in a language revitalization classroom for students ages 5-12 learning Teotitlán del Valle Zapotec, an indigenous language of southern Mexico. Although each method used for creating books in Zapotec generated a positive reaction from students and parents, I consider the ways in which each method facilitates student learning while also problematizing the cultural authenticity of the classroom. Based on classroom observations, a parent focus group, and student interviews, I conclude that the most effective method for storybook creation involved students creating their own book modeled on a pre-existing book written in the non-indigenous language. This student-created book generated sustained interest in the language and allowed for students to shape the materials into something that was culturally relevant for them personally.