Based on your search for an AI video creation tool, Beautiful.ai could be a great fit for your needs. Although it's primarily a presentation tool, its AI-driven features can help you create visually appealing and engaging content that can be used in videos.

The Design AI feature is particularly useful. It automatically determines the best design for your slides, saving you time and effort. This feature could be beneficial if you're looking to create educational videos but lack the time or design skills to make them visually appealing.

Additionally, the Drag-and-Drop Editor and Templates can simplify the process of creating your content. You can quickly build slides, allowing you to focus more on the content and less on the design.

Finally, the Team Collaboration feature allows you to work with other teachers or students in real-time. This could be useful for group projects or when creating school-wide presentations that could be turned into videos.

Please note that Beautiful.ai does not offer a completely free version and its pricing may not suit everyone. However, it does offer a 14-day free trial for you to test out its features.