Webquest is an Internet-based learning and teaching tool, within which is a process involving students and teachers to use it for educational purposes. As an educational tool, the webquest has gained popularity in the education field across subjects and settings and is generally well-received by both teachers and students. Many junior high school English teachers use webquests to support modern teaching methods to improve students' instructions and learning processes in new opportunities of using webquest resources in English classes, as well. This study aimed at investigating the advantages and disadvantages of using webquests in Iranian junior high school English classes. This study also examined the application of webquests to motivate high school English teachers to teach more efficiently and provided the learners with a wonderful situation to learn English well. The present descriptive-analytical study was conducted in 2019 in four cities of Isfahan Province, Iran. The participants included 16 Iranian English teachers chosen based on the stratified random sampling method from junior high schools. The questionnaires and interviews were used to collect the data and the participants' insights about the advantages and disadvantages of using webquests in their English classes. Many English teachers considered webquests helpful and believed that it could help students do duties better and that the teachers could teach English more effectively and meaningfully. Webquest resources, likewise, help teachers work in groups and share ideas associated with the school curriculum.