ArcGIS Online is an online, collaborative web GIS that allows you to use, create, and share maps, scenes, apps, layers, analytics, and data. You get access to ready-to-use maps, apps, and Esri’s secure cloud, where you can add items and publish web layers.
For more detailed information visit What is ArcGIS Online?
Set up a free Esri ConnectEd Organizational ArcGIS Online account for your school.
Setting up a ConnectEd Organizational account for your school is free and relatively simple. You will need at least one person to take the responsibility of being the organization administrator. Get started by going to ConnectEd. Scroll down the page to the instructions for setting up a free account.
ArcGIS Online Story Map
ArcGIS Online Story Maps enable you to add images and video to your map. Here are three examples from Tennessee: TN Blueways, Nashville Flooding, Bearden Planning.
To learn more about making Story Maps go to Story Maps Resources.
ArcGIS Web Apps
You can use an ArcGIS Online app or create your own app to present your map. For example, if you have two layers you want people to compare, use the ArcGIS Online swipe app.
Click this link to see a map on floods in the United States: US Flooding
If you can't find an app that meets your needs, you could build your own. Go to Web App Builder to get started.
GeoMentors
Several GIS professionals have volunteered to be GeoMentors for educators and students. You may be able to find one near your school who would be willing to help your students with technical GIS questions. To find one, click on the link to the US K12 GIS map and click on tab 4 to see the GeoMentor Map. Detailed information for each GeoMentor is provide by clicking on the map dots. GeoMentor Map
ArcGIS Online SkillBuilder
Whether you are an ArcGIS Online beginner or experienced, you should download the SkillBuilder. The SkillBuilder presents three levels of ArcGIS Online skills with instruction on how to master each each level. Just go to ArcGIS SkillBuilder to download a copy and get started.