Hi Mary,
A few strategies that have helped me when introducing new online tools:
1. Schedule a couple of 'beta tests' with small groups of volunteers. They can let you know what's confusing, what they like and don't like, and serve as an inside group of ambassadors for the new system.
2. Have a few large-group introductory tutorial sessions where you walk through the process of using the system from sign-on to sign-off, showing all the features, and taking time to explain clearly what to do - especially reassuring people they won't 'break' the system. Ask that everyone attend one of these.
3. Offer a few follow-up practice sessions for anyone who is still having trouble.
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Michelle Moon
Director of Interpretation and Program Evaluation
The Newark Museum
Newark NJ
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