The School Finance Redesign Project: A Synthesis of Project Work to Date

Highlights the School Finance Redesign Project's early findings on the funding needed for all students to meet academic standards, promising ideas for focusing funding on promoting learning and rewarding educators, and the current system's constraints

Steps in the Right Direction: Assessing Ohio Achievement Everywhere -- the Kasich Plan

Ohio Governor Kasich issued his "Achievement Everywhere" plan in early February, and as details came out over the following weeks we again asked Professor Hill if he would provide a review of the governor's plan. Professor Hill took on the challenge and here the Thomas B. Fordham Institute proudly presents "Steps in the Right Direction: Assessing "Ohio Achievement Everywhere" -- the Kasich Plan", which should interest lawmakers, policy makers, journalists, and others concerned about the education of Ohio's children. As the title notes, Professor Hill observes that Governor Kasich's reform plan will advance Ohio and it schools, but it could be better and bolder. Or, as Professor Hill concludes, "Governor Kasich's Achievement Everywhere moves Ohio in the right direction, but it needs to go further if the ultimate goal is a world-class education for all students.

Multiple Pathways to Graduation: New Routes to High School Competition

Examines three approaches -- targeted population, district-wide, and linked learning -- to raising graduation rates, benefits, and challenges; what is required for implementation; and which approaches work well for different types of districts

Performance Management in Portfolio School Districts

Explores the challenges of performance-based oversight of portfolio districts -- districts trying to provide diverse types of schools with common standards and accountability -- and the capacities needed. Includes profiles and best practices

Facing the Future: Financing Productive Schools

Synthesizes the School Finance Redesign Project's findings on policy options for redesigning the system to focus resources on promoting student learning. Calls for student count-based funding, integrated data collection, innovation, and accountability

Compressive force generation by a bundle of living biofilaments

To study the compressional forces exerted by a bundle of living stiff filaments pressing on a surface, akin to the case of an actin bundle in filopodia structures, we have performed particulate Molecular Dynamics simulations of a grafted bundle of parallel living (self-assembling) filaments, in chemical equilibrium with a solution of their constitutive monomers. Equilibrium is established as these filaments, grafted at one end to a wall of the simulation box, grow at their chemically active free end and encounter the opposite confining wall of the simulation box. Further growth of filaments requires bending and thus energy, which automatically limit the populations of longer filaments. The resulting filament sizes distribution and the force exerted by the bundle on the obstacle are analyzed for different grafting densities and different sub- or supercritical conditions, these properties being compared with the predictions of the corresponding ideal confined bundle model. In this analysis, non-ideal effects due to interactions between filaments and confinement effects are singled out. For all state points considered at the same temperature and at the same gap width between the two surfaces, the force per filament exerted on the opposite wall appears to be a function of a rescaled free monomer density $\hat{\rho}_1^{\rm eff}$. This quantity can be estimated directly from the characteristic length of the exponential filament size distribution $P$ observed in the size domain where these grafted filaments are not in direct contact with the wall. We also analyze the dynamics of the filament contour length fluctuations in terms of effective polymerization ($U$) and depolymerization ($W$) rates, where again it is possible to disentangle non-ideal and confinement effects.Comment: 24 pages, 7 figure

Baselines for Assessment of Choice Programs

Critics of choice argue that it will allow alert and aggressive parents to get the best of everything for their children, leaving poor and minority children concentrated in the worst schools. (Note 1) But choice is not the only mechanism whereby this occurs. Alert and aggressive parents work the bureaucracy to get the best for their children. Thus, choice programs should be compared against the real performance of the current public education system, not its idealized aspirations

On the Properties of a Bundle of Flexible Actin Filaments in an Optical Trap

We establish the Statistical Mechanics framework for a bundle of Nf living and uncrosslinked actin filaments in a supercritical solution of free monomers pressing against a mobile wall. The filaments are anchored normally to a fixed planar surface at one of their ends and, because of their limited flexibility, they grow almost parallel to each other. Their growing ends hit a moving obstacle, depicted as a second planar wall, parallel to the previous one and subjected to a harmonic compressive force. The force constant is denoted as trap strength while the distance between the two walls as trap length to make contact with the experimental optical trap apparatus. For an ideal solution of reactive filaments and free monomers at fixed free monomers chemical potential, we obtain the general expression for the grand potential from which we derive averages and distributions of relevant physical quantities, namely the obstacle position, the bundle polymerization force and the number of filaments in direct contact with the wall. The grafted living filaments are modeled as discrete Wormlike chains, with Factin persistence length, subject to discrete contour length variations to model single monomer (de)polymerization steps. Rigid filaments, either isolated or in bundles, all provide average values of the stalling force in agreement with Hill's predictions, independent of the average trap length. Flexible filaments instead, for values of the trap strength suitable to prevent their lateral escape, provide an average bundle force and an average trap length slightly larger than the corresponding rigid cases (few percents). Still the stalling force remains nearly independent on the average trap length, but results from the product of two strongly L dependent contributions: the fraction of touching filaments and the single filament buckling force.Comment: 21 pages, 8 figure