Based on your search query, I would recommend hilink as a suitable EdTech tool for teaching engineering.

hilink is an AI-powered virtual classroom and lesson planning platform that offers a suite of features to make online teaching more engaging and efficient. Here's how it can address your needs:

1. AI Lesson Planner: This feature allows you to create comprehensive lesson plans quickly. You can input the topic, audience, and keywords, and the AI will generate a lesson plan. This can be particularly useful for planning engineering lessons, which often require a structured approach.

2. Virtual Classroom: The virtual classroom includes interactive tools such as breakout rooms, whiteboards, and a built-in media player. These tools can be used to facilitate group discussions, illustrate engineering concepts, and share relevant videos.

3. Learning Management Features: With a built-in calendar and to-do list, you can stay organized and manage your engineering classes effectively.

4. Student Engagement Tools: Features like quizzes and polls can be used to assess students' understanding of engineering concepts. The platform also supports group work in a virtual setting, which can be beneficial for collaborative engineering projects.

Remember, hilink operates on a freemium pricing model, so you can start with the free version and upgrade to the Pro version if you need advanced features.