"Three Hours Charity" is a charity platform initiated by China Foundation for Poverty Alleviation, aiming at encouraging everyone to participate in charity activities and providing help and support to poor areas. If you want to check whether you have participated in cloud teaching activities, you can follow the following steps:

1. Log on to the 3-hour public welfare official website (http://www.3-hour public welfare. Org) or download the 3-hour public welfare APP and register as a volunteer.

2. Enter the personal center and click "My Activities" to view the list of activities that have been participated.

3. In the activity list, look for the activity named "Cloud Teaching". If you find this activity, you can confirm whether you have participated in it.

If you want to know more about cloud teaching activities, you can go to the 3-hour public welfare official website or APP to check the introduction and related reports. At the same time, we can also pay attention to and participate in other public welfare activities on the platform and contribute to the development of poor areas.