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Instructional Research Group (IRG) is an educational research institute based in Los Alamitos, California, specializing in large-scale program evaluation and field research in reading, mathematics, and the education of English Language Learners. Led by nationally renowned researcher Russell Gersten, IRG focuses on developing classroom observation instruments, assessing implementation methods, and conducting randomized controlled trials to evaluate the impact of professional development in education. With a commitment to improving educational quality through research, IRG conducts numerous meta-analyses and research syntheses in intervention research across various educational domains. Their senior staff remains at the forefront of research and expertise in mathematics and reading instruction, response to intervention, and research methodology. Generated from the website

Established in 1958, Brush Research Manufacturing Company is a private, family-owned company that offers a full line of power and wire brushes. It has more than 75 employees and an ISO 9001:2000 certification. The company also provides miniature, auto and diesel, radial coil, scratch and maintenance brushes. Its brushes are made of carbon and stainless steel, brass, nylon and polypropylene materials. The company is a member of the American Brush Manufacturers Association. Brush Research Manufacturing offers brushes from various brands, including NamPower and Flex-Hone. It additionally provides floor sweeps and brooms and paint and applicator brushes. The company also serves clients in Germany, Hong Kong, Russia, Thailand and Switzerland. Brush Research Manufacturing is located in Los Angeles.