School Absentee whilst Holidaying

As i've mentioned on here before me and the family including partner plus a 11, 8 & 1 year old are spending 5 weeks over in Europe. This means to two older children will be missing 4 weeks of school.
I'm a big believer in the ability for real world travelling experiences to be great educational learnings for children and i want my children to gain some of this whilst on holiday.
What have others done in regards to their kids missing school? Do schools still give the kids work to do whilst away? Should i get them to keep a journal? Provide them with a project?
Thoughts?
I'm a big believer in the ability for real world travelling experiences to be great educational learnings for children and i want my children to gain some of this whilst on holiday.
What have others done in regards to their kids missing school? Do schools still give the kids work to do whilst away? Should i get them to keep a journal? Provide them with a project?
Thoughts?