Potential Paths: Path 1: Using Decktopus, the teacher can make use of the pre-built templates as a base to design a Halloween-themed presentation. The AI capabilities will autofill the slides, saving them time for other tasks. However, limited customization and reliance on internet connection are potential drawbacks. Path 2: The teacher can opt for Curipod for its wide array of interactive features such as polls and questions, which could make the Halloween-themed lesson more engaging. Additionally, they could use pre-existing lessons available, although it is not assured if a Halloween-themed lesson exists.

Final Narrative: Curipod seems like a fitting choice for you. This platform will not only allow you to create a visually appealing presentation, but also foster student engagement during the lesson.

Start off by leveraging the built-in AI to quickly generate a presentation deck, which you can then proceed to enhance with multimedia materials relevant to the Halloween and English-speaking countries' context. Make the most out of Curipod's interactivity features – add polls to your slides for comprehension checks, initiate group discussions around cultural insights, and enable a slide with the reflection option to encourage students to think more deeply about what they've learned.

To share the presentation, simply provide your students with a sharing code or a link. This means you can seamlessly integrate the digital lesson into your current setup, regardless of whether you're teaching in-person or remotely. If necessary, you may assign editing permissions to your students for group assignments, further extending the practical usage of Curipod.

Lastly, the platform offers both free and premium plans, catering to a range of budgets. You may want to opt for the premium plan at $7.50 per month to unlock additional features, such as unlimited interactive slides and quick sharing through links. There's also a free plan if you'd like to try Curipod's core features first.

By using Curipod, you'll be able to create engaging, interactive presentations that not only cater to middle school students' learning preferences but also maximise your efficiency and productivity as an educator.