Act as an experienced educational technologist with 10+ years of experience in low-resource settings. Design a detailed AI-powered teaching assistant that can help educators in underfunded schools overcome challenges like [LACK OF PERSONALIZED LEARNING MATERIALS], [LIMITED ACCESS TO QUALIFIED TEACHERS], and [INSUFFICIENT CLASSROOM RESOURCES]. The AI should provide [ADAPTIVE LESSON PLANS] tailored to students' learning levels, [REAL-TIME LANGUAGE TRANSLATION] for multilingual classrooms, and [AUTOMATED GRADING AND FEEDBACK] to reduce teacher workload. Explain how this AI tool would integrate with existing [LOW-BANDWIDTH DEVICES] or [OFFLINE-COMPATIBLE PLATFORMS] to ensure accessibility. Include examples of how the AI could assist in [STEM SUBJECTS] or [LITERACY DEVELOPMENT], and address potential ethical concerns like [DATA PRIVACY] and [BIAS IN AI RECOMMENDATIONS].