AmeriCorps is a US organisation that trains volunteers to serve the community in various civically-minded ways. A recent evaluation examined the effects on pupils’ maths achievement of training AmeriCorps volunteers to teach maths strategies to struggling maths pupils in grades 4–8 (Years 5–9). The volunteers used scripted protocols to teach three maths strategies to struggling pupils. Each strategy was studied in prior research and shown to have positive effects on achievement: concrete-representational-abstract, which uses concrete objects to teach concepts; cover-copy-compare, which teaches steps for computation and provides practice; and cognitive-strategy instruction, which teaches pupils to use procedures and reasoning to solve word problems.
AmeriCorps volunteers had to agree to a year-long, full-time commitment and received four days of training before starting the intervention, with additional training one and two months after. Each school received at least one volunteer from AmeriCorps, who was mentored by one school-staff member who was fully trained in the programme.
Subjects were 489 pupils in 150 Minnesota schools who were randomly assigned to either receive the intervention at the start of the school year (n=310), or to a control group who would receive the intervention a few months later (n=179). All pupils had scored below proficient in the prior year’s state maths assessment. During the intervention, pupil pairs with similar maths scores were to receive maths support for 90 minutes a week for a term. Post-tests using STAR Math were analysed two ways: the intent-to-treat analysis included all pupils who received the intervention, and showed significant positive effects as compared to the control group (effect size = +0.17); and the optimal dosage analysis that included pupils who received the targeted 12 weeks of intervention for at least an hour a week. Effect sizes for the experimental group increased to +0.24 when pupils were given the optimal dosage.
Source: Evaluation of a math intervention program implemented with community support (May 2019), Journal of Research on Educational Effectiveness, DOI: 10.1080/19345747.2019.1571653