Children will be discouraged from hugging friends and library books will be quarantined under new guidance for reopening schools safely.
Classes will resume from August 11, with all schools expected to return full-time by August 18.
The Scottish Government has published guidance for schools to allow them to prepare for reopening.
Some of the measures will be mandatory for all schools, while others are optional.
Movement of children and staff between classrooms should be minimised and pupils should be kept within the same groups as much as possible, it says.
For younger children, “resources such as sand, water and playdough should be used only by consistent groupings”.
Bringing toys into school from home is discouraged but items such as books, bags and personal devices are allowed for a pupil’s own use.
Scientific evidence says the two-metre physical distancing rule is not required between pupils but a number of optional mitigating measures are suggested for secondary schools.
It says “encouraging young people not to crowd together or touch their peers is recommended”, giving examples of “hand to hand greeting” and “hugs”.
Schools are encouraged to use all available space in classrooms, halls and libraries as long as they do not “introduce capacity restraints”.
Face coverings are not required for children but anyone who wishes to wear them should be enabled to do so.
Adults should wear face coverings if they are within two metres of someone and are “interacting face-to-face for a sustained period” of 15 minutes or more.
Library books will also have to be quarantined for 72 hours after they are returned.
The guidance says: “The amount of infectious virus on any contaminated surface is likely to have decreased significantly after this time.”
Doors and windows should also be kept open as much as possible to improve ventilation.
“Assemblies and other types of large group gatherings” will also be prohibited.
Theatre performances and brass bands will not take place during the initial return as the scientific advice around this is still being developed.
Pupils should be kept within the same groups for as much of the school day as possible, though the guidance accepts this will be difficult to maintain.
It says: “The practical and timetabling challenges of these approaches, particularly in secondary schools, are recognised.
“The variation in size, context and physical structure across schools is also recognised.
“If groups cannot reasonably be maintained, or if groups require to be larger in size with some mixing permitted, the application of other risk mitigation measures becomes even more important.”
In the event of an outbreak at a school, discussions on any possible closure will take place between the school, local council and health protection teams.