When teachers are developing lesson plans it is very important to think about what kind of activity will encourage students to think of numerous possible solutions or ways to solve a problem instead of just one correct method or answer.

In order for students to learn that there is not always one right answer teachers must consciously work at not just feeding them with answers. Some teachers too often simply respond to the students with answers, instead of questioning the students and encouraging them to think through all the possibilities to the answer. Even after the students have explored all the possibilities and given their answer, teachers need to question them and have them explain what they found out.

As teachers question their students about their ideas, teachers need to allow an appropriate amount of time for students to critically think about what they want to say.

When teachers use wait-time between their questioning students will see that sometimes many explanations are possible for just one question. Teachers should avoid asking questions that can be answered with a simple "yes" or "no." This does not encourage students to think critically about the question. It also models that there was just one possible answer to the question. Students will understand that there are many ways to think of one idea when teachers ask open-ended and extended-answer questions. After the teacher asks the question there should be time given to the students to think of their response. Even after they respond the first time the teacher should try to give more wait-time and also ask the students to explain their response. Teachers should constantly be asking their students why-questions so that it encourages the students to think more deeply about their responses.

When students understand that there will not always be one right answer they will become better critical thinkers and this kind of thinking will lend itself to all other subject areas. This is a skill that the students will hopefully use throughout their life.

Source:https://www.nde-ed.org/TeachingResources/ClassroomTips/Not_Always_One_Right_Answer.htm