Olympiad Practice Question Development

I need a seasoned content-creation company that can rapidly build Olympiad-level practice material across Math, English, Science, Social Studies, General Knowledge and Logical Reasoning. For every exercise that already appears in the prescribed school textbooks, I want several graded follow-up questions that push the same concept from basic recall to higher-order application, so students can practise until mastery.

Scope of work
• Map the current textbook questions for each subject.
• Create multiple fresh items per concept, varied in style and difficulty but true to Olympiad standards.
• Provide crisp answer keys and concise explanations so teachers can mark quickly and learners can self-correct.

The job is urgent, so I’m looking for a company with an in-house editorial and subject-matter team that can start immediately and scale output without compromising accuracy or originality. If your team has prior Olympiad or competitive-exam experience, please share a brief sample set following the structure above along with your estimated turnaround time per chapter.