Table 2: Means and standard deviations (in parentheses) of the pretest, quality of learning strategies, and posttest scores in the two phases of the study.

Classroom BClassroom A
First phase:
Prompts + solved example problems
Second phase:
Prompts
First phase:
Prompts
Second phase:
Prompts + solved example problems

Prior knowledge
 Pretest 2.63 (0.59)2.88 (0.55) 
Quality of learning strategies
  Cognitive strategies3.12 (0.55)2.57 (0.49)2.76 (0.61)2.52 (0.50)
  Metacognitive strategies2.06 (0.98)1.85 (0.66)1.35 (0.47)1.60 (0.70)
Learning outcomes
  Procedural knowledge2.76 (0.67)2.88 (0.62)2.92 (0.54)3.15 (0.62)
  Conceptual knowledge2.98 (0.60)3.02 (0.42)2.87 (0.53)2.77 (0.50)