MANICE
The Manual of Standards and Procedures for Observing and Reporting Ice Conditions [www.canada.ca/en/environment-climate-change/services/weather-manuals-documentation/manice-manual-of-ice.html] from the Environment and Climate Change Canada (ECCC) provides authoritative information for observing of all forms of ice.
Ice Watch
Ice Watch [www.cryo.met.no/en/icewatch] is an international, collaborative program to coordinate Arctic-wide visual sea-ice observations collected from ships operating in ice-covered seas of the northern hemisphere, and includes recording underway sea-ice observations with the ASSIST software and data sharing.

Sea-ice Infographics
Background information is available from various sources, including in the form of handouts or videos.

Other?