All of the following practices may be helpful in developing rational thinking except

The use of reason, the ability to make sense of things, and the application of logic to establish and verify truth are defined as rational thinking.

 Key PointsHow to develop rational thinking-

• ​Using cause-effect relationships- The cause-effect relationship is understanding the relationship between the cause and effect of an event. Children see cause and effect relationships every day, whether they recognise them or not. Teachers who emphasise cause and effect relationships help students learn to think critically.
• Encouraging project-based learning- Teachers should encourage project-based learning in children to help them build rational thinking. 
• Using controversial issues- Controversial issues focus students' attention, increase motivation, and produce a higher level of rational thinking.
• Encouraging scepticism- scepticism is about asking the right question of ourselves and others to gain understanding. Scepticism helps in developing rational thinking.
• Consulting literature- Literature can help in developing rational thinking by knowing about the skills needed to get through difficult situations and consider all viewpoints.

Hence, we conclude that rational thinking cannot be developed by avoiding controversial issues. Controversial issues need to be discussed in the class to develop rational thinking.