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657 tutors in 31 topics, built by 75 teachers. Each one follows a lesson plan its teacher wrote.

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Foundations 89

All Foundations89 AI basics25 How language models work23 AI safety and ethics49

Everyday AI 91

All Everyday AI91 Prompting20 ChatGPT and Claude at work25 AI for writing29 AI for research and study33

Building with AI 162

All Building with AI162 Python for AI21 Building with LLM APIs30 RAG and search21 Evaluation and testing21 AI agents31 AI automation25 AI coding assistants30

Machine learning 149

All Machine learning149 Machine learning35 Data science and statistics30 Math for AI23 Deep learning28 NLP14 Computer vision14 Fine tuning and training12 MLOps and deployment18

Creative AI 77

All Creative AI77 Image and video AI58 Audio and voice AI12 AI for design33

AI at work 145

All AI at work145 AI for business34 AI for marketing and sales23 AI for product and operations28 AI for education28 AI for professionals29 AI careers18

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RAG and search Advanced Clear all

Evaluating Retrieval Quality

Evaluating Retrieval Quality

Measure whether your retrieval finds the right passages with real queries, relevance labels and the right metrics.AdvancedEvaluation and testing4.7(3)75 lessonsSampleFumiko Arai$11 RAG Explained for Non Engineers

RAG Explained for Non Engineers

Understand how AI assistants answer from company documents, what can go wrong and what to ask your team.All levelsRAG and search4.7(3)66 lessonsSampleEmeka NwosuFree Fine tune, prompt or retrieve?

Fine tune, prompt or retrieve?

Choose between prompting, retrieval and fine tuning for your problem, and know whyAll levelsFine tuning and training4.7(3)59 lessonsSampleNeha VaradanFree Metadata Filters and Permission Aware Retrieval

Metadata Filters and Permission Aware Retrieval

Filter retrieval by date, product or tenant and make sure users only ever retrieve what they may see.AdvancedRAG and search4.7(3)57 lessonsSampleEmeka Nwosu$11 When Retrieval Is the Wrong Tool

When Retrieval Is the Wrong Tool

Decide when RAG fits a problem and when a database query, tool call, longer prompt or plain search fits better.All levelsRAG and search4.5(2)40 lessonsSampleFumiko Arai$5 Reranking Retrieved Results

Reranking Retrieved Results

Add a reranking stage that puts the truly relevant passages first, within your latency and cost budget.AdvancedRAG and search4.5(2)35 lessonsSampleEmeka Nwosu$10 Keeping a RAG Index Fresh

Keeping a RAG Index Fresh

Keep retrieval in sync with changing documents: updates, deletions, versions, permissions and re-embedding.AdvancedRAG and searchNewFumiko Arai$10 Long Context Versus Retrieval

Long Context Versus Retrieval

Choose between sending whole documents to a long context model and retrieving passages, using evidence.All levelsRAG and searchNewFumiko Arai$6