教师应使用教具以及各种材料，以帮助幼儿理解。
The teacher makes use of usual AIDS and other objects and materials to aid comprehension.
如果您使用视听教具的话，您可以检查一下可用性和可视性。
Check for availability and visibility if you are using audio or visual AIDS.
她希望她的员工(老师)接受这些教具的使用培训，但要理解他们(她的教室工作人员即老师)更是教室活动的观察者，而非指导者。
She wanted her staff to be trained in the use of these materials but to understand that they (her classroom staff) are more observers than conductors of classroom activities.
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