1. 10 lesson plans by the application of Thinking Tools for the third year students in Roi-Et Rajabhat University were found: Key Question, Walk and Talk, Think Pair Share, Round Robin, Mind Mapping, Jigsaw, Hug Thinking, Place Mats, Card and Chart, and Hot Ball. Students were interesting with the activities by the application of Thinking Tools. Some students amazed with the activities and questioned many. The teacher asked back some questions to induce them to think about and then connected the questions with its answers. When the students finished all the lessons, they thought to implement these Thinking Tools for their students in the future for the purpose of teaching their young students by individuals, pairs, and groups.
2. The lesson plans had the effectiveness index at the 0.84 values. It indicates that the students’ knowledge increased from 84.12%.
3. The students’ satisfaction with the Thinking Tool lesson plans were at the highest level.