This study focuses on assessing the contribution of ELL services to Spanish-speaking students' mathematics learning in elementary schools. ELL students tend to have lower average math achievement at school entry and throughout elementary school. The term "ELL services" encompasses English-as-a-second-language (ESL) programs, bilingual…

As special education inclusion policies become more widespread, classroom compositions are changing in ways that affect all students. The present study fills a critical gap in the literature by documenting the extent to which having a classmate with an emotional disturbance (ED) is linked to kindergarteners' absences. Because having a classmate…

In 2002, the No Child Left Behind Act (NCLB) called for "highly qualified" teachers in every classroom in order to increase student outcome and provide equitable learning opportunities to all students including poor and minority students. content and pedagogical knowledge before they come into the classrooms. However, research evidence…

Many educational Randomized Controlled Trials (RCTs) collect baseline versions of outcome measures (pretests) to be used in the estimation of impacts at posttest. Although pretest measures are not necessary for unbiased impact estimates in well executed experimental studies, using them increases the precision of impact estimates and reduces sample…

The growing availability of data linking students to classroom teachers has made it possible to estimate the contribution teachers make to student achievement. While there is a growing consensus that teacher quality is important and current evaluation systems are inadequate, many have expressed concerns over the use of value-added measures (VAMs)…