Year Three students taught angles with Geometer's Sketchpad improved significantly in van Hiele level of geometric thinking from pretest to posttest on all three angle concepts¶

Claim · All claims
Evidence · 1 study · causal r2 · q2 · i3 large
Currency · newest study 2013 · not yet checked against its sources · not reviewed by a person

Subclaims¶

q2 i3 The experimental group's van Hiele level improved significantly for right angles (effect size 0.38), acute angles (0.62), and obtuse angles (0.91) after six Geometer's Sketchpad lessons. → Poh Geik Tieng & Leong Kwan Eu 2013

Evidence¶

Poh Geik Tieng & Leong Kwan Eu 2013¶

Poh Geik Tieng & Leong Kwan Eu. (2013). Improving Students' Van Hiele Level Of Geometric Thinking Using Geometer's Sketchpad. The Malaysian Online Journal of Educational Technology, 2(3). www.mojet.net. https://eric.ed.gov/?id=EJ1086363

q2 · i3 · causal · r2

Paired samples t-tests in the findings section for the experimental group (n = 16) across three pre/post tests. Obtuse angles showed "The effect size is 0.91"; right angles t(15) = 3.00, p = .01, effect size 0.38; acute angles t(15) = 4.98, p < .01, effect size 0.62.

"The paired samples t-test analysis showed that the students' van Hiele level of geometric thinking on obtuse angles after the intervention using Geometer's Sketchpad ( M = 2.00, SD = 0.00) was significantly higher than the students' van Hiele level of geometric thinking regarding obtuse angles before the intervention"

Discussion¶

Related Claims¶

• Within the experimental group, van Hiele levels differed significantly across the three posttests, increasing from right to acute to obtuse angle tests — related
• Traditional chalk-and-talk instruction also produced significant pre-to-post gains in van Hiele level of geometric thinking on all three angle concepts — related
• The two groups were equivalent in van Hiele level at pretest except for obtuse angles, where the control group scored significantly higher before instruction — related
• The GSP condition used researcher-prepared worksheets guiding students to discover geometric concepts by dragging and transforming shapes in a computer laboratory — related
• Experimental-group students' learning achievement and creative thinking posttest scores were significantly higher than their pretest scores after learning with the model — related
• Students' ICT literacy showed no significant correlation with their van Hiele level of geometric thinking after Geometer's Sketchpad instruction — related
• Post-test van Hiele levels did not differ significantly between the Geometer's Sketchpad group and the traditional instruction group on any angle concept — related