This calculation assumes a constant rate of return on investment in each year, which is unrealistic. (alpholio.com)
... be picky, and guest post on blogs that you think will provide the best return on your investment in time. (birdsofafeatherpress.com)
For too long, states had no systems for accountability, and the result was too little transparency about student results, system improvement, and the return on our investment of tax dollars. (educationnext.org)