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.
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.
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