

The Development of E-Worksheet Using Kvisoft Flipbook Maker Software Based on Lesson Study to Improve Teacher’s Critical Thinking Ability. Therefore, it can be concluded that e-worksheets using kvisoft flipbook maker software based on lesson studies that have been developed can improve critical thinking ability of teacher and students. Based on the result, the developed e-worksheet in chemistry material has exactly valid with score percentages 88.88% and average critical thinking ability about 60 with enough category. The data were analyzed using N-Gain formulation. It lets you use paint and sketch ink anywhere. This free animation software for beginners doesn’t require much RAM.
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It is based on traditional animation and comes with a manual on how to use this software. It has a minimalistic UI with least distractions in the interface. The draft e-worksheet was validated by experts using validation questionnaires and critical thinking ability instruments using essay tests. Pencil2D is an open source animation software.

The subject of this research was involved chemistry teachers and student of grade XI of Senior High School in Rokan Hulu, Riau, Indonesia. This research used development model 4-D namely define, design, develop, and disseminate. The purpose of this study was to develop e-worksheet using kvisoft flipbook maker software based on lesson study to improve chemistry teacher’s critical thinking ability. Therefore must improve their quality by conducting various learning innovations, one of them by implementing ICT-based learning.

The effectivity and efficiency of the learning process is very dependent on the quality of teacher.
