Give students answers to all questions.
Explain in extreme detail how each result was reached.
And when they've had enough, then can read answers and understand while the problem is fresh in their minds.
If you don't give answers, no one will be able to use your online material without you being there to hold their hands.
Forbidding students from publishing their answers also goes against let students learn by teaching.
Keep the example/theory ratio high, very, very high.
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