Why is it so often activities show a warning for not recommending use on mobile phones? Is there a particular list of functions or CL sinks and sources that are known to malfunction on mobile devices? Is there a way for teachers to assess viability of an activity functioning on a large subset of mobiles?
All sinks and sources should work on mobile. The warning is there to caution that some things like graphs, tables, and sketch screens may be difficult to scroll past, and other components like card sorts may be difficult to work with. Additionally, layouts that are built to show side-by-side will show in a single column.