Ms. Dell is researching the Waldorf technique for teaching fractions to her inclusive fifth grade classroom. She found pre-post studies conducted by researchers using the Waldorf technique. She also found meta-analysis that included the results of lower-quality studies. What can she conclude concerning whether the Waldorf technique is supported by rigorous evidence?
◦ The technique is supported by pre/post studies of effectiveness.
◦ The technique is not supported by evidence of effectiveness.
◦ The technique is supported by strong evidence.
◦ The technique is supported by possible evidence.